There's already "Scam Accusations" section:
https://bitcointalk.org/index.php?board=83.0Although not all of the programs/websites are evaluated there, a simple search on that section about certain website/program should give you a heads up (in case there's an accusation).
Furthermore:
http://www.badbitcoin.org/
Users rank shouldn't put them into a different category (same as you shouldn't trust any high rank member, due to their status since you never know if someone is the real owner or simply just using a bought account).
IIRC Newbie members can't vote.