i have weird feels about a banlist
if we were to have an "official" banlist, the biggest problem i see is that the list kinda has to be public knowledge. what comes from that is shaming and general distaste for a user that probably does not deserve it.
i think that perhaps the best solution to this behavior is a better wotc system.
ideally, this is what i have imagined:
host A's game has just finished, and host B's game is just about to begin.
host A had problems with player X's behavior, and warned them during their own game
host A PMs the name of player X to a wotc mod (nonplayer or something)
host B's participants send their wotc votes to the wotc mod instead of to the host. if enough votes are amassed, that player is removed from the signups list.
player X's behavior in host A's game should only be valid for some amount of time (some number of games)
there are probably problems here, but at the very least, i do not want to see the banlist, because i am sure there are people whose play will be affected by a public banlist