Never crashed on my fixed gear. I don't think I ride in a way that would subject myself to that, unless a car/another rider hits me or something. I ride fast and I ride frequently... but I also don't ride over my head.

Crashing is a big topic in the motorcycle world, and most crashes are from rider error, like target fixation or not being completely comfortable in a situation causing white-knuckle syndrome. Sometimes, the way bikes are set-up does not allow for the rider to have complete control, i.e. wierd dropped bars, bad fitting, too hard gear ratios, no brakes, etc.

With the minimal danger involved with riding FG bikes (considering nobody's doing backflips out of skateparks), crashing should be a rare occassion. If you're crashing because something runs out in front of you, you have to stop suddenly, or you have to swerve and manuever, I say fight the power and install a brake or get your bike set-up so it's easy to manuever. Losing fashion points is better than crashing, IMO. And, you can still have a sweet looking bike even with safety precautions.