Prejudice exists. Some cops see riders as a-holes and scoff-laws, and they are assumed to be at fault even in the face of hard evidence. Cops sometimes lie on accident reports (I know this first hand) without repercussion. Thankfully, these types are the minority, and I think as time goes by more police realize that not all adults who ride are DUI riders or weirdos. I have no idea how judges come up with some of the sentences they do. As for stolen bikes, how do you suggest they use limited time and resources to find the purloined bikes? It's just about impossible.