Not to downplay *any* of the incidents discussed on the board, but I've been in DC 13.5 years and nothing has ever happened to me (yes, I realize I've just doomed myself to a mugging in the near future). And I go to all the places discussed here often. It's a crapshoot; I'm no more careful or aware then they -- but, as you see, even the folks who've been mugged are still here to tell the tale. Key is to hand over your stuff, and be obvious about not looking at them enough to i.d. them.
Damn, that sounded scary. DC isn't scary!!!