That reminds me of the incident that involved the professor, the cop, and the president a while back.
I had an incident about a year ago similar to this. I was on my way home in my pickup when I met a county sheriff. Strangely enough, I wasn't doing anything wrong at the time.
He turned around in the road to follow me, which was funny to watch since it was a narrow road and he was in a hurry.
He gets up on my tail so close I could only see the top of his car in my mirror, and he stays there all the way to my house, which was about another half mile. I got a little aggravated about being tailgated like that for no reason. When I pulled in the driveway, he pulled in behind me and lit me up. I got out and went to his car and asked "do you need something". He told me to go back to my truck and wait, so I repeated my question. At this point it was like being called by a telemarketer and being told to hold while they connect you. Finally, he told me that he was looking for someone who was driving a red pickup, so he was just checking to see if I was the guy he was looking for. He said have a nice day, killed his lights and left.
When all was said and done, this was not that bad of an encounter, and the guy was just doing his job. My problem wasn't really with what he did, but how he did it. He could have handled the situation with much more tact and courtesy. The aggressive driving (that he would have ticketed me for), and lighting me up in my own driveway. Why couldn't he just pull up behind me and do his thing without all the spectacle? There may be a reason, but I don't know what it is.