Gabe Newell steam account

How do we know this is Gabe Newell?

Official VALVE steam group : http://steamcommunity.com/groups/Valve

....This is Gabe.

http://steamcommunity.com/id/gabelogannewell

He's Playing Killing Floor ??? :D

ahahah , i'm just joking :P

And this is Gabe's TF2 backpack.

Gabe should be VAC Banned. I don't care how, I want it to happen.

His log-in username is "gaben@valvesoftware.com" and his password is "MoolyFTW."

Trying to find the real one is gonna be hard but i think its the one in the VALVe group only makes sense.

Gabe's Steam account

And apparently on of his favorite gamea is Syphon Filter, which is why the logan part is in there.

this is http://www.youtube.com/watch?v=hXp51MQnPEg