banning and defederating communities

Hey all, I recently left reddit like many of you. I have a question regarding lemmy and the fediverse on the history of banning and defederation. I have noticed several posts calling for varying communities to be disconnected. were these removal requests as prevalent before the mass migration? Usually I am all for communities existsting in their own spaces, barring illegal content. I am hoping that the new users are coming here with the intent to learn how this community works, before we try to remake the community we just left.