This question made me realize that I could become an expert in anything I wanted at any time; there is nothing stopping me. I guess I'm just not interested.
Survivalist knowledge would be practical in emergency situations. You'd get things like first aid, nutrition, self-defense... Seems pretty broadly applicable.
e: Thought of something. I want to be an expert assassin. Really top grade action movie shit so I can kill whoever I want while maintaining safety, secrecy, and connections.
I've never been good at reading stuff like this, so it's more than plausible I'm just missing it, but I can't find where the resolution would give anyone the legal power or moral authority to invade another state.
One time on IRC the topic of what Boxing Day even is came up, and this guy said in seriousness that it's to memorialize the Boxer Rebellion, and we had a big fight about it. He backed up his claim by pointing out that the horse from Animal Farm was an allegory for said uprising, so he wasn't just making things up.
I think going forward it would be wise to have a rule that communities need to be actively moderated at some minimum interval by an account on the community's home instance, or else face closure or the institution of new moderation. Sitting on an unused community is like owning unused private property. "I don't want this, but I don't want you to have it either."
"I understand your mental health problems and your efforts to be your best self. The pros of spending time with you outweigh the cons; you have not lost my affection."
vs
"This topic brings my discomfort with you to the fore. Join me in a mutual lie so that we can continue our suffering and never make progress."
You might look up synthetic vs analytic languages and see if that doesn't shed some light for you. I think most people who don't natively speak very synthetic languages have a hard time with it in second languages.