Originally Posted by RWD_cossie_wil

Banning users really does not help anyone, as it simply cuts off the only form of contact people have?

Why not:

1) Ban the user from the traders section to prevent them selling/buying.
2)Enforce a DO NOT BUY OR SELL WITH THIS MEMBER signature with a thread link, so other users have the information they need to make a decision if they want to deal with them.