Im not so much thinking about documentation but mostly them spying. After you go to 3 different drags and the police involved know you pretty good what are they gonna say when they pull you over on the freeway when your doing a 100+. Most cops are cool when you become friends with them, I have a few and have considered becoming a police officer many times, this is probably why I think this. If the cop pulls you over for speeding what if he says you were racing, and he knows this because hes seen you race with his own eyes. If you take it to court whos the judge gonna believe. Wether it stands or not its probably not worth the hassle. But hey who knows.