A while ago I thought of a great way to deal with abusive users on non-techy Web forums. The problem with banning users from forums is that they just register another account and continue until they get caught again, and so on, and banning by source address tends to affect a lot of innocent folks.
The idea: If a user is “banned”, they are the only one who can see their posts.
I say “non-techy” above because I think users of tech-oriented boards would figure out what was going on, and when they did they’d just create another account. To the non-technical user that frequents boards like mine it’d just seem like no-one was rising to their bait anymore.
Think it’d work?