https://lists.mcls.org/pipermail/michlib-l/2024-December/033792.html

It has come to our attention that some libraries in Michigan have been receiving visits from their local FBI offices.

Agents have been specifically interested in Maker Spaces and 3d printers, the library policies for what can or cannot be made, and how the library maintains the digital files used to create items and tracks usage and users.

(see link for more)