I see people driving around everyday, stuffing their fat faces full of Taco Bell and the like and surviving, but that doesn't make it a good idea. I know a few (very stupid) folk who still drink and drive, and they use the same argument: "It hasn't hurt me or anyone else." Yet. Riding a brakeless fixie is nowhere near as reckless as drunk driving, but that doesn't mean that it's a good idea.

You can stop a bicycle faster with a fixed gear drivetrain and a front brake than you can with just a fixed gear drivetrain. Removing the brake just reduces the function of the bicycle, which is to be a vehicle that can efficiently and safely transport the user from point A to B (among other things: exciting, exercising, etc...). It needs to go when you need it to, and it needs to stop when you need it to.

Alien abduction, polytheism, healing crystals, demonic possession, and Reaganomics makes sense to some. How does removing the brakes from a bike make sense? I mean, it certainly makes fashion sense (bike looks cleaner, all the hipsters are doing it, blah blah blah...), but I don't recognize fashion as a reason to reduce function.

The only issue you see is legal liability in the case of a collision? Gee, if only there was some way to provide a safety cushion against collisions...