You've probably seen them zipping down your neighborhood streets whether you're in a big city or a ritzy suburb. They're pocket bikes. Those tiny motorcycles that sit "about the bumper height of SUVs and many cars." The only thing more troubling than their popularity is the fact that those riding them don't see any danger in regards to the largely illegal devices. In almost all municipalities the bikes are only legal on private property. Yet I see them on sidewalks and on regular roads, disobeying street signs and barely avoiding real cars that could splatter them across the road even at 20 mph. This story from San Diego mentioned a 19-year old in New York City dying after he hit a pothole and fell during a 3 a.m. police chase. And that was from a pothole, not running into a Suburban. Consider this the Autoblog PSA for the week.