Plenty of people riding around on bikes with just a coaster brake and nothing in front. Fixed gears offer a lot more modulation and control than a coaster brake.
this.
******
people need to get over the brakeless = fashion thing. i mean, we get it, you dont like the trendy, ignorant youth that frequent YOUR coffeeshop. how dare they ride a bicycle like you do... would you rather they park their lime green civics out front and play loud bass-heavy music and rev their cars too 8000rpm? thats what kids did ten years ago when i was younger. im fine with them riding bikes now...
besides, 'hipsters' ride fully rigid SS 29ers now anyway. dont you know?