Since there’s no serious answer: hexbear is a highly toxic instance that has been defederated by most other instances. However, their users will keep tabs on what’s said on other instances, and they’ll occasionally show up en masse with alt accounts to attack something that particularly enraged them.

Many of them are…not quite mentally stable.

They’re probably the single largest base of tankie support. For them, America = bad, and anyone opposed to America = good. They pretend to care about communism etc but they’re really just anti-American. Saying anything negative about China gets you instantly banned.