Even if this is true, it's not the reason most people who ride SS with just a front brake do that, they do it because they want to look like they're riding fixed, when they're not. It's fashion. Which is pathetic given other people's safety is potentially involved. HTFU and ride fixed or buy a front brake.
That stuff just grinds my gears.
oh and this
http://www.youtube.com/watch?v=GlDY0BaDbcU&feature=related