The reality is those accounts have been tagged and they will not be hired for any campaigns unless some silly bounty manager just doesn't care. Noone will risk a trade with them most likely, and if they were banned they would just create new accounts and try to stay hidden(probably already have). As it stands they can really do no harm and there are warnings for bounty managers to see. If you see these accounts registered in a sig or bounty campaign, message the manager and let them know, but I doubt you do.