That's just someones opinion. I agree that if the op doesn't want someone to return then they'll add a ban with that kick, or just ban (but not kick) and let that person sit there, unable to talk (we use that method, calling it a 'mute', and sometimes it proves to be more effective than kicking someone). But an automatic rejoin is useful if someone manages to get opped up and then kicks everyone out before they get booted out themselves (and obviously not opped up again in that room).
