I'm suggesting a "Trade with Caution" title for scammers. It would be put on as a usertitle, and can't be edited by the user, only staff. On HF, staff didn't do shit about scammers, and barely anyone checked rep/scam reports, so this title would be an easy giveaway that you either shouldn't deal with this user or make them go first. It can be removed by staff if they feel to do so.