I absolutely despise scammers!!! and i don't believe that they should be allowed a second chance. Scamming is a deliberate and methodical act that is as heinous and equivalent to a digital murder or identity theft. If there was a crime for scamming online, (which i believe that there is) and it were enforced, there would be less of it going on. I'm not sure what can be done, but scammers should be banned from forums -one strike and ur out. and all posts should be monitored for scams and deleted immediately no questions asked.
on another note, you know how some scammers in game will show an item and then exit trade window and then put a different item in? I think there should be a way that if that happens there is a button in trade window that you can click it, it will send the last 10 trades that person made to a moderator that can check to see if this person is scamming and then ban the account and put all items that are in the account up for auction. Prolly not plausible, but something still needs to be done with scammers.