THEY'VE SEARCHED for you. They've come to your door and knocked. Oh, you might not have answered. Maybe you hid in your bedroom, or peaked through the curtains, but they came nonetheless. You've seen them walking up to your door in their discount suits, clip-on ties, and clean-shaven faces. In 2008 they spent 1,488,658,249 hours doing just that. Indeed, with the possible exception of their constantly evolving policy on blood transfusions, Jehovah's Witnesses are probably better known for their door-to-door proselytizing than for anything else. It might come as a surprise to learn, then, that for as intensely as Witnesses try to recruit new members, they try even harder to shun those who come to doubt the religion.