There's a certain amount of "don't ask -- don't tell" built-in to our legal system. It's what allows you to sometimes do 80 in a 65 on a deserted highway without being stopped by the cop you blew past. It's a judgement call on the part of the police.
By cracking down on street racing, it means more severe penalties for those that are caught. This is a good thing for the most part. If you take measures to not get caught, odds are you're not endangering anyone while racing. The system works.
