^Valid point.
I think people tend to say "I hate cops" because the officer's actions directly affect you (getting a ticket), whereas people acting like idiots at a car meet, while annoying, do not directly cause a negative impact on you (they can be ignored).
I have also met tons more ahole cops than professional ones, and I have to admit my overall perception of police (at least the ones sitting around clocking people) is not good. But my brother's neighbor is a cop and he's a cool guy, so yes, they are not all bad.
But just drive responsibly and you don't have to have a problem. And the times you get pulled over for nonsense...just be courteous.