I’d like to think Lemmygrad’s operators keep their connection logs fairly well-protected, and store as little user data as possible.

I’d honestly be more concerned about opsec (operational security). For example, you might post in an apolitical thread about how you live outside of a city, you work at a local coffee shop, or maybe your username is “redcarowner69”. There’s three facts about you that someone with too much free time (or nation-state funding) can begin to arrange.