Obviously, if you’re doing the same gimmick it would be easy to pick you out

I think this is the issue. Lemmy isn’t Reddit yet (although, give it time.) Most people who are copping bans at this stage are either (a) being insufferable in some fashion or other and refusing to stop (b) running afoul of lemmy.ml. I think in almost all cases of (a), what they are doing is returning exactly to form with the new account and then being all surprised that no one’s throwing roses and cheering them on this time around.