Cobra, I'm not a moron. I've never insulted a police officer (to his face, at least), never raised my voice, never done anything remotely rude. I always add "sir" to the end of my sentences. Except for some underage drinking and "experimentation" in my earlier years, I'm completely law-abiding. So far, I have no police record at all, mostly for three reasons: Good Manners, Good Luck, and Good Running Shoes.
Note that good manners alone won't protect you. Neither will the courts. Since this thread was started by an anecdote posted on a forum, let me chip in some anecdotes of my own:
Once, when I was in high school, several of my friends and I were walking through town late at night. We were travelling in two groups, one about a hundred meters behind the other. We had the bad luck to walk by a store that had been broken into a few hours earlier, where some cops (apparently having nothing better to do) decided to set up an ambush. Everyone in the first group got arrested; then the cops noticed the second group, and everyone (including me) just ran. The kids that got arrested were held overnight and charged with bullshit crimes (which were dropped before they went to court). They literally got arrested for walking down the street.
My senior year of high school, a friend of mine got arrested (also a bullshit charge, later dropped) because he refused to let a highway patrol officer conduct an unconstitutional search of his car. He was held for several hours, then released. I had to pick him up at 5 AM, then drive him to the impound lot where he had to pay a few hundred dollars to get his car back.
Another friend of mine got ticketed based on a neighbor's complaint. My friend took it to court, and the case was quickly dismissed because the cop had no evidence at all (except the neighbor's inadmissible hearsay). Nevertheless, he was a minor and had a bad driving record, so the DMV suspended his license for six months. (The complaint was that my friend had almost hit a deer that was crossing the road late at night, which somehow became "reckless driving.")
The cops in my hometown had a reputation for stealing weed when they arrested people, or using the threat of arrest to steal weed. This happened several times.
There are other accounts I've heard of people getting ticketed, and challenging the tickets. If the cop shows up, he'll probably lie on the witness stand (and of course a cop's word counts for more than the defendant's and several friends). If he doesn't show up, the judge will schedule another hearing instead of dismissing the charge.
But all that's just gravy. Let me tell you about two cases that really piss me off. They both involve kids who had epilepsy, one of whom I knew from jr. high and high school:
In the first case, a kid had a seizure and someone called 911. (This was the kid I knew - he was ~17 when this happened, and weighed about 100 pounds.) The police arrived first, decided to arrest him, and then he had another seizure. The police figured he was resisting arrest, so they dog-piled him until he suffocated.
In the second case, someone in his early 20's got arrested for possession of drugs. He did have drugs - they were prescription, in a prescription bottle, with a prescription label that clearly described what the drugs were, what they looked like, and who they were prescribed to. He also had valid identification, proving that he was the person mentioned on the label. Nevertheless, he was arrested, his meds were confiscated, he was denied a phone call, and then he was thrown into a jail cell for several hours, unsupervised. At some point he had a seizure (probably because he didn't have his meds!), and of course there was no one around. I think he choked to death on his own vomit.
So yeah, I kind of dislike the police.
Also, those two cases happened within a few months of each other. I remember reading the letters to the editor in the local paper. They were full of uninformed dipshits defending the cops. ("The police have a right to protect themselves from hundred-pound epileptics!" "Put yourself in the officer's shoes!" "It was his own fault!")