Of course, defining "bad form" in nomic is a minefield, and a blanket ban would be a bad idea when part of the game is exploring these limits. But what about a rule prohibiting clear, unambiguous and severe breaches of good form, with clear malign intent? Or a rule with specific prohibitions (e.g. don't prevent participation for more than a week, don't risk ending the game, don't tarnish Agora's reputation)?
Speaking for myself, if you say something's not welcome then I'd respect that, no tricks.
But are you sure you don't want me pulling stunts like de-registering everyone? How about, I don't know, once a year?
-Dan