From what I read it is because he stated this on his application or whatever so the show was aware of it. The other guy that was kicked off apparently lied on the application saying there was never any past criminal activity.

It's funny cause DB told me in a PM that he doesn't even see what the problem was - so he threw a phone at his girlfriend who just gave birth to their son 3 weeks earlier - where is the crime in that ?

I told DB that ain't right but sometimes he just doesn't get it. :p