This is the only response I have seen to my question that could maybe change things - specifically having automatic sensors in every vehicle that automatically alert police when you do something dangerous. I think this would be unrealistic to implement, but assuming you could, it would probably help (assuming sensor data could be used as proof of bad driving).

As for reporting bad driving, you really need proof of a person's bad driving if you're going to penalize them for it. Having more traffic cameras helps a bit, but people just learn where the cameras are and drive carefully when they know they are being filmed.