I don't think it's fair to catagorize all cops as pigs. Alot of what happens to you when you get pulled over is how you behave when the cop talks to you. If you behave like an ignorant piece of shit, you'll most likely get treated like a piece of shit.
My buddy had a real severe moment of retardation and while doing a U-Turn broke his tires loose in a fish tail at an intersection. Well guess who was behind him. Yup! The po' po'. The cop pulled him over and could have written him up for multiple offenses. Wreckless driving, expired insurance identification card, and possibly a couple of other infractions.
My friend was honest about his stupidity. After taking my buddy's registration and driver's license to his car and probably running a background check, the cop came back only with a warning.