This has been said elsewhere and better, I am sure, but there is no such thing as "reality TV."
TV is a communication vehicle for certain essential lies. The two main sorts of lies it transmits are economic and personal. TV depicts people who are not just consumed with consumption, they are defined by what they consume. It creates an identity between purchasing things and living. Watch enough TV and you will, too - which is why it is there.
The personal lies that TV tells are about status and security, and norms of behavior. The TV world is one in which people are always setting and enforcing norms of obedience and respectability. Even the antiheroes have to conform to the mold. An obedient, respectable audience is easy to control. TV breeds Republicans. TV breeds sheep. TV is unamerican.
Reality is anathema to TV because life trumps commerce. Commerce serves life, not the other way around; commerce is almost irrelevant to life. Only the smallest, meanest minds think money and possessions are the most important thing in life. Reality is anathema to TV because we're all different and the actual norm we should be living up to is thinking for ourselves.
People who watch TV all the time are more pathetic and disgusting than crack addicts. I've lived with both and prefer the crackheads. Turn the TV off and take the fucking pipe out of your mouth.