Analogies for casinos selecting whom can and can't play bj?

I was thinking of analogies that put the casino practice of selecting whom can and can't play their bj games, into an unfavorable light.

My first thought was a game of "Who wants to be a millionaire", in which anyone who gets a right answer in the pre-game testing, gets the boot because they are a risk to actually win the money. So nobody ever wins the million. Not that anybody would watch the show after a while.

Hmm, analogies. "Booting counters is like..." I dunno. There are probably some funny ones.

cold