It's never possible to control scam by admin/mod panel. It will create a false sense among the newbie that they aren't going to be scammed while they certainly will be eventually. Therefore, it's better not moderating scam here. The number of forum users are beyond controlling scam I guess.
DT members are doing much better by tagging scammers & possible scammers. I guess that's enough for people who are having trades here & have a little awareness of self- defendant.