So is vegetarianism.
Much ado about nothing, I think. Standing on your head isn't going to convert you. Or anyone.
That said, don't do yoga. It can wreck your neck, back and hip joints and send you to the hospital if not practiced correctly. No westerner does it correctly. For one thing, we grew up sitting in chairs, Hindus sat cross-legged on the ground.
Not to mention, fat chicks in yoga pants should be considered a federal crime.