Single post in Display a symbol of some sort to designate banned users

The only thing I can think of that would make this useful is if someone is messaging or trying to trade (if they're trade locked) with the person in question, but otherwise I don't see a need for it. Obviously, it would have to only be visible for the duration of the lock, and not after. But yeah, currently it also goes against site rules in general, as Kiryu said.