While certainly true that not all cops are bad, my personal experience shows that it's not at all rare, either. Or if they're not "bad", at least they don't behave with the respect and responsibility that should attend the power they wield.
A really significant portion of my "official" interactions with police have been negative. I've listed these here before:
- I watched a friend being roughed up by cops. (not beaten, but physically pushed around) for absolutely no reason.
- I've had evidence of a traffic violation fabricated against me. (full disclosure: I was guilty, but that doesn't excuse lying about evidence)
- I've had police at a traffic stop curse at me and throw my documents. (I understand why he felt this way, but it was due to him making assumptions, starting with a belligerent attitude, and misreading the situation)
- Some older kids were physically bullying me and a friend. We went to a cop for help, and the extent of his aid was to say to us "better watch out, they'll probably hit you again".
Given the limited amount of interaction people normally have with police, the number of times this has happened to me says that I'm either a lightning rod for lousy cops, or the problem is more than just a few isolated bad eggs.