All "reality" shows, none of which so much as brush shoulders with reality as they pass each other in the hall of life.
American Idol, because it's all about public humiliation and nothing about fostering talents and hopes.
What Not To Wear, in which horrible, snotty, ill-bred, unattractive, badly-dressed "experts" have the gall to humiliate perfectly attractive people into appearing the way they say they should. And why would anyone sit still for this? There's a very distressing overall trend in the TV humiliation genre, which anyone with a particle of self-respect would not participate in or revel in watching.
Las Vegas (or Vegas, whatever it is, with James Caan), which, if this is possible given such stiff competition in these categories, the most poorly-acted, self-important, shallow series currently airing.