yeah its getting shocking.
the other night i was admittedly speeding (about 75 in a 60), casually cruising past traffic (unaware of the cop car hiding a few cars back), i was in a sedan not my r33. I change lanes to cruise past a 33 who was doing the speed limit, and as i get next to him he dumps it and takes off, at which point the flashing lights go on and we both get pulled over, the cop comes up and tells me that ive been caught street racing and that they can take my car. Absolutley shocked i explained the situation, and anyone whos been in that situation will understand its next to impossible to remain completely calm and collected when your being falsely accused and risk losing your car!
anyway we were both let off with warnings, and the police were very reasonable and fair from then on. But as mentioned, all it takes is one copper with a bad attitude and you can be completely screwed even if innocent.