I think reality shows will stop when people stop watching them.
I knew one of the chef's on one of the chef shows. She owned the restaurant across the street from a studio I worked at four years ago. No idea what they show was, though. She was nice and got a lot of evil fan mail and she said if she had ANY idea, she would have turned it down.
One of the studios where I worked shot the one reality show where the people living in the house was secluded. I don't watch them so I don't know which one it was...the one with airplanes flying notes to the people living in the house...anyway, I hated it. When they were on a shooting schedule, security was tighter than usual and it made it harder to work each day.