Originally Posted by Scrodzilla

Once when I was skidding like a maniac in the parking lot across the street from the shop trying to get the cog to loosen up/fail, I snapped the non drive side crank arm instead (it was just a cheapo crank but still). I'd say the cog isn't going anywhere...

I'll probably throw a brake on one of these days.

By the way: I'm not saying everyone should go out and ride a brakeless fixed gear bike equipped with a suicide hub at maximum speed and busting mad skidz in busy downtown traffic. I'm just saying that in my experience, I have had no trouble and most "reports" of how completely unsafe it is are typically made by people who have never done it.