Do you mean in the sense that you could join a server that has malicious intent?
@Skepticalme @judgedread users should block other users directly I mean, for sure. The issue is when instance admins block other instances (mostly arbitrarily) it fragments the fediverse. Instance blocks are generally helpful to 1) block spam, and 2) maybe to block NSFW content if your instance is targeted towards kids? It’s less helpful when it’s used to silence opinions you don’t like.