Know why there are speed limits in the first place? Because there are tons of jackasses out there who can't drive worth a fuck, think they can, and want to play Michael fucking Schumacher out on the interstate - and smash into a carfull of pregnant nuns and kill them. If everyone would just know their capabilities (for lack of a better word) and stay within them, there wouldn't be a NEED for speed limits in the first place - or most of the other laws that we have. Every law we have is there because some jackass couldn't keep his hands to himself or shut the fuck up.
There are laws in place because there is a need for them to be. Maybe YOU aren't the reason, but someone is. Just like pollution, or dying rainforests, or homeless kitties...if you don't want to feel some 'overspray' of necessary enforcement, get out yourself and do something to HELP instead of just bitching about it.
If you aren't doing anything to proactively better the situation, then you don't have any right to complain about it. Which is precisely why I'm not complaining.