I have yet to see a compelling argument for riding a fixed on the street, especially without additional brakes. I admit to never riding one because of the risk of getting thrown over the handlebars. Forget to keep pedaling? You're tossed! Shoelace caught in gear? You're tossed! Tight and fast turn while your foot scrapes the ground? You're tossed!
I don't know anyone that has been involved in an accident, but the minimalistic design itself makes them dangerous. Having front and rear brakes will always slow you faster than just skip-stopping your rear tire or applying counterforce on the pedals. I'll continue to think that it's idiocy until someone tells me why it's either not risky or worth the risk.
And doesn't skidding your rear tire often necessitate regular replacements? Seems expensive.