One of UberTS's brothers, Kris Von Kiel
Kristian Von Kiel "Von STEEL " (1-0-0) Official Mixed Martial Arts Record
was an active member of the bodybuilding.com forums and posted similar pictures/videos on the forums over there and then supposedly had something to do with gay porn, though I didn't find much about that other than a pic of him that could have easily been faked...
UberTS goes by the same name SCE on the forums over there and his brother is like kvkx111 or something similar and has since been banned. UberTS started a thread on the bodybuilding forums back in June/July asking how his physique was, of course no one believe he was 17, so he showed the DL and birth certificate... people accused him of being his brother, etc
You can read through both of their post histories and see that either they have been trolling everyone since day 1 about their ages, which is unlikely as the timeframe for his "older brothers" to be in their early 20s match up perfect, or they are just genetic lottery winners, which is far more likely...
sorry to out your last name UberTS, but it wasn't really that hard to put together...
as for steellifter, it's not that hard to believe that he would post a seemingly "unrelated" post in support of UberTS in the thread about his internet friend and roommate for the weekend and not make the disclosure that they know one another... i'm sure people do that sorta shit all the time...