Here is a story about some fixed gear riders. There is no one posting on this website who is anywhere near as tough or "hard core" as these folks. Notice they all used brakes - and would have laughed at anyone who suggested they didn't need them.
Riding without brakes is a fad. Nothing more. People are welcome to follow the fad if they want - but the idea that brakes on fixed gear bikes are "uncool" is the height of stupidity.