Another forum participants are looking for fraud/scam with ICO and publish their investigations in this thread
https://bitcointalk.org/index.php?board=83.0. And DT2 give the red trust ANN topic starters and bounty managers after such information.
This is also not going to work. The scammers usually don't have account here in BT. So usually they hire someone to post the ANN thread, or create a junior level account. Even if the DT members tag the account, it is not going to affect them. They will just hire someone else or create another account. That's why despite all these investigations, we are still having scams.