In the marketplace, I think we should have a vouch system...
Like in HF, except that he never got around to doing it.
Like...
Vouch = +1 vouch number.
Scam report = Number becomes red
Bad trade = -1
Anyone with 2+ scam reports or -5 or less "vouch" should have the marketplace temporarily disabled until:
1) If scam reports, they must ALL be cleared.
2) If -5, the marketplace will be disabled for you for 3 weeks, and then it will automatically reset your vouch to 0 INCLUDING the negatives inside your vouch system EXCEPT that they will show up as neutrals. (expired)
And there will be a team to handle the "vouch" system.
After a trade, if the vouch system is abused you can PM a mod and they can review the evidence. Or, you can set up a team JUST to handle these things.
Like, the mods from the scam report section can handle it.
And then, if you try to reverse a bad trade, and the evidence points HEAVILY that you DID indeed do it, you will get:
1) -4'ed for rep.
2) The original -1 to vouch will increase to -2. Keep bothering the mod and it will fly to -3.
Scam reports will also have a link that says "Scam Report #_" and it will link to the scam report, and it will show up underneath the vouch number, and a mod has to put it there after he reviews it. After the scam report has been resolved, the person will either be banned or the link removed.