Zak Jensen from TUF 10, the guys who jerked off in the shower, didn't clean up and got called out in front of everyone by Wes Sims , and then got locked in the bathroom by James mcSweeney.
Remember; the guy who was picked last, even after the camera dude (good ol' Rampage).
And then picked on by everyone, according to several members of the season, he was a weirdo who from the first day talked about the incident that got him arrested after the show ended
(some rich college kid Jensens was working for as a bodyguard died in Mexico under his guard)
and everyone was uncomfortable around him.
"I STEPPED INTO A POOL OF LITTLE JENSENS"©Sims
Anistavio Medeiros, the last pic (and he was butthurt about it all season) from TUF Brasil 1 (Wanderlei vs Vitor) was so annoying, he acted like a TUF 1 contestant for the whole season, pissing off pretty much everyone with his unfunny pranks.
I mean TUF had been running for 6 years or so, fewer contestants acted like that anymore...
In the last episode, before the good-bye party, everyone in the house ganged up on him, tied him up and left him somewhere so they could enjoy that time instead of having to deal with Medeiros' bullshit one last time.
Also from this season, Daniel Sarafian (Demian Maia's student at the time IIRC) gets a honorable mention (even if he was a finalist, and also got into the UFC, he did poorly and got released).
Bragging to everyone that he was easily tapping Babalu (one of Wanderlei's grappling coaches) unconscious during training (with no witnesses of course), only to face the heat: Babalu and Dida were not happy.
It's a bitch move to brag about "victories" in sparring, but when it's exaggerated (like Babalu claimed) it's even worse, especially for brazilians.