You can also look into the long, long list of defunct instances because they got defederated by basically everyone because noone wanted to deal with their shit. Hexbear and lemmygrad don’t care if they’re defederated because they’re platforms to themselves, the instances I’m talking about were basically 4chan, kiwifarms, whatever, chuds getting banned on ordinary instances setting up their own and trying again. When that didn’t work the instances collapsed as harassing others was their only purpose.