Best way to make members aware of someone ripping people off in trading section?

Well, the guy has been a member for more then a year, has almost 200 posts, and several positive feedback. Not the stats someone who usually scams.
Well as for as I can tell he hasn't posted since June 27? Coming up on 40 days since he has posted here? Unless you know something that we the masses don't? I think you can call them hosed!