[SurfersCreed]

Think about it: Who does everyone keep saying isn't being real?
Who's VT is TOTALLY unlike the personality we see in the house?

Callum is just TOO much of an odd character.
He creates too much drama out of nothing to be a real person.
Even the way he's set himself up as the 'hero' out to do battle with his nemesis - the "evil Dexter" - is too operatic for real life.

I submit that Michael was sent in there to throw us off the scent.
Callum was the long term mole.
And if you think no one could keep up an act that long, 24/7, read about Daniel Day-Lewis and other method actors.

If I'm proven right next week, then I nominate Callum for an Oscar!