They'll do nothing.
I know some will claim I'm being negative or just spouting hyperbole, but I've seen it so many times I quit caring because Google doesn't care either.
Adwords bans legit advertisers and the scumbags will always find a way back in.
If this guy gets caught he'll just start 4 new companies and change them up a bit and get 4 new Adwords accounts. But in my previous experience, Google will do nothing so he won't even need to do that.