Some of the people you see riding fixed on the street (like me) actually spend considerable time on the track. They put in mileage for fitness on the street so it's sometimes logical to expect to see them on a track bike. I have 2 track bikes that take a brake, and 2 that don't. If riding downtown just for fun, I will more likely take one with a brake, just because at over 50, I don't like crashing into things because I can't stop. I studied Physics in University, so I realize that the coefficient of static friction is greater than the coefficient of dynamic friction, therefore I am fully aware that skidding is a really bad way of stopping compared to a brake, and I no longer have the need to look cool by riding a brakeless bike. Good enough reasons?