Maybe some form of hybrid system, where the OP and the forum moderator can decide if someone can stay or not after evaluating their posts in that thread. Maybe a 3 strikes and you're out rule, giving EVERYONE the opportunity to participate and only those who don't want to properly engage people (Per the OP's point of view) get two warnings and then they are gone from that thread.
Quote from dev:
Some form of OP self moderation would be a great tool to keep stupidity from wrecking threads.
