[hannah.]

I completely disagree, and think it's just a kind of coincidence in the way that when they're picking BB housemates they obviously choose people who are going to be entertaining, and horrible/stupid people are more entertaining.
It's not like all the caucasian housemates are always really nice, intelligent, well rounded individuals. If that were the case then you'd have a point.
About 80% of housemates are dicks.