Let's make a list of users to stay away from just for the Newbies section.
Post a username/profile link of the user and a reason to be added to the list.

I'll start off with the user Penetration
He's been called out as a scammer and no doubt has made 50 BTC from scams.

List:
https://bitcointalk.org/index.php?action=profile;u=66853 (Penetration)
https://bitcointalk.org/index.php?action=profile;u=104073 (Si Robertson)
https://bitcointalk.org/index.php?action=profile;u=110549 (Clue4)
https://bitcointalk.org/index.php?action=profile;u=108199 (BitcoinDesktopTicker) Infected files.