No. I can't say I'm too shy to be on something like that as I'm pretty social (you'd have to be to tap random strangers on the back and ask them what their names are). I can't say the reason is that I hate reality television shows, because in reality I actually enjoy watching a number of them. If not because everyone loves them (X Factor, American Idol, Big Brother, anyone?), then for the lulz (I'm sure nobody watches Wife Swap because they think it's a good show).
Meh, I guess it's down to me finding it sorta disturbing. Knowing that people could sit down at home and watch me do whatever it is that I do. You live your life everyday, and people can watch you walk down the road, they can watch you sit at your desk, but for all of your life to be exposed on someone's plasma screen? It just doesn't seem right to me.