Nothing. However, some large instances could belikely to defederate whatever instance they sign up on and it could become a liability. You could also choose to defederate or block them yourself I think.
If you are usually a reddit lurker and are on here, it would be cool if you can try and engage with communities for a bit, just to try and get the ball rolling :)
r/The_Donald has been banned on Reddit, what's to stop those users turning Lemmy into what became of Voat?
title
Why is my food making lightning? (i.imgur.com)
Mexico supreme court decriminalizes abortion across country (www.theguardian.com)
I'd like to encourage people on the fediverse to comment/upvote/post more than when reddit
If you are usually a reddit lurker and are on here, it would be cool if you can try and engage with communities for a bit, just to try and get the ball rolling :)