Piefed has one built-in, Voyager has it client side, there are probably other apps too, feel free to share your list in the comments
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I posted this about Lemmy a year ago. Please correct any of this that is now outdated:
Regarding the post title: Lemmy itself allows you to block communities, instances, and users. But it does not support filtering by keyword, e.g. filtering out any post with the word "platypus" in the title regardless of where it was posted or by whom. With help from the comments below, here are some third party Lemmy clients that have their own implementation of keyword filtering:
- Boost
- Connect
- Eternity
- Interstellar
- Raccoon
- Summit
- Sync
- Tesseract
- Thunder
- Voyager
Do NOT support keyword filtering:
- Alexandrite
- Jerboa
- Lemmy UI
- mlmym
- Next
- Photon
- Quiblr
Comment anything I have missed or mistakes I made
Seems up to date, thank you for sharing
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Filtered out: Slam, slams, slammed.
Removes a lot of non-news "news" posts.
I always think of basketball when I hear that
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I brought that up a couple months ago. There was a little discussion about potential issues, but I don't think there was any consensus to not do it
Glad that I'm not the only one that wants that type of feature, but that thread makes some good counter points. I didn't think about the possible abuse cases.
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I posted this about Lemmy a year ago. Please correct any of this that is now outdated:
Regarding the post title: Lemmy itself allows you to block communities, instances, and users. But it does not support filtering by keyword, e.g. filtering out any post with the word "platypus" in the title regardless of where it was posted or by whom. With help from the comments below, here are some third party Lemmy clients that have their own implementation of keyword filtering:
- Boost
- Connect
- Eternity
- Interstellar
- Raccoon
- Summit
- Sync
- Tesseract
- Thunder
- Voyager
Do NOT support keyword filtering:
- Alexandrite
- Jerboa
- Lemmy UI
- mlmym
- Next
- Photon
- Quiblr
Comment anything I have missed or mistakes I made
This is very useful to me, thank you
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Seems like a good reminder as this topic shows up regularly
Share your keywords? I'm considering doing this, Lemmy's 'Active' feed is nearly as bad as doomscrolling Twitter was
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Seems like a good reminder as this topic shows up regularly
No matter how thorough you are with your filters the comments are still cancer.
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Filtered out: Slam, slams, slammed.
Removes a lot of non-news "news" posts.
slam,slams,rumor,Rumor,could,might,may,sends a message,sends message,warns,warn,?
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Share your keywords? I'm considering doing this, Lemmy's 'Active' feed is nearly as bad as doomscrolling Twitter was
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No matter how thorough you are with your filters the comments are still cancer.
If you don't see those posts, you don't see their comments
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No matter how thorough you are with your filters the comments are still cancer.
Eternity app can filter comments, too!
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If you don't see those posts, you don't see their comments
Yeah I could have been clearer.
I have a few accounts, one of them is filtered AF for when I dont want any more doom for today. No matter how unrelated to end stage capitalism or American politics or Gaza a post is someone in the comments finds a way to bring it up.
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Filtered out: Slam, slams, slammed.
Removes a lot of non-news "news" posts.
But muh slam death metal =(
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I would like to have the ability to change words or phrases into other words, like "Trump" into "Dementia Don Diddler". It's like filtering, but more fun and amusing to me. Also, I realise I might be the only one that would like that functionality.
A bonafide use for AI, for me, would be hiding every photo of Trump, Musk, and Putin. They are ugly both inside and out, seeing posts or articles with their photos ruins my mood.
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Yeah I could have been clearer.
I have a few accounts, one of them is filtered AF for when I dont want any more doom for today. No matter how unrelated to end stage capitalism or American politics or Gaza a post is someone in the comments finds a way to bring it up.
I usually report those comments, depending on the community mods might remove them
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My own list on my main account is quite short
- trump, musk
- Nazi, nazis
I have another account where I don't have any filters that I open weekly to follow world news
Same but add beans
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I use blocklists a hell of a lot. This should be a mandatory feature for all social media. Reddit is unbearable without it. Also need to use it on Lemmy quite a bit. On reddit I was at almost 200 words in the filter. Lemmy is also building slowly.
I only have 15 user accounts in my blocked list, although that is because PieFed allows blocking all users from an instance, so I have blocked all from lemmy.ml (and PieFed.social is already defederated from hexbear and lemmygrad).
Having to go through and block so many people individually was just far too much of a pain - I can see why people leave Lemmy over exactly this issue (and then complain about Lemmy over on Reddit for being somehow even more toxic than there - the trick is that once you get the blocklist right then the average interaction is better on the Threadiverse, though truthfully the maximally worst ones are also here as well, extremely unfortunately especially in terms of our growth or rather lack thereof).
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A bonafide use for AI, for me, would be hiding every photo of Trump, Musk, and Putin. They are ugly both inside and out, seeing posts or articles with their photos ruins my mood.
Also detecting filter keywords within the image would be nice
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Seems like a good reminder as this topic shows up regularly
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Seems like a good reminder as this topic shows up regularly
Some filter is fine, but let's try to not overdo, shall we?

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I only have 15 user accounts in my blocked list, although that is because PieFed allows blocking all users from an instance, so I have blocked all from lemmy.ml (and PieFed.social is already defederated from hexbear and lemmygrad).
Having to go through and block so many people individually was just far too much of a pain - I can see why people leave Lemmy over exactly this issue (and then complain about Lemmy over on Reddit for being somehow even more toxic than there - the trick is that once you get the blocklist right then the average interaction is better on the Threadiverse, though truthfully the maximally worst ones are also here as well, extremely unfortunately especially in terms of our growth or rather lack thereof).
It's incredibly rare for me to block users. It's all keyword blocks (e.g. Elon). Some domains like dailymail were good to block, but I don't think Boost lets me do that.
