Cops do tend to "profile" people, especially younger people. For example, when I was in high school, we had a cop come to my physics class to explain how a radar gun worked(it was a cool cool class that day, hehe). Afterwards, we naturally started asking this cop questions. Eventually it got around that most of the kids had been pulled over and we asked why it seemed that kids got pulled over often. Her response was to tell us that high school kids are easy to spot. Stickers all over the back of your car, something hanging from your rearview mirror, 15 kids packed into your car, trash sitting in clear sight, etc. She said that if a cop say any of these things, it would make that cop more likely to pull over the car to "check on things". Over my course of growing up in Dallas, I saw this to be true to a certain extent. (I'm not saying this is true anywhere else, only where I grew up, but it is a thing to look for on other cars and look at yourself and see what kind of statement you are making)
Now that I've been in college, I have noticed that the "profiling" is still true, to a certain extent. I DO think it is up to the cop that is at the scene, the cop might be prejudiced in some way or another, or the cop might just be having a bad day and strike out at the first person/persons that happen to push him over an edge. The Police Dept here in Savannah have recently (past year or so) been going thru a lot of shit for police brutality, racial profiling, and such. Claims of only pulling over blacks, of using excessive force with blacks, and not giving the same treatments for whites, or the miority hispanics in town. Things like Drug Check Points are placed in the "dirty" parts of town and enforced there, but NOT in the parts where the "white money" have returned to the downtown areas.
It all really comes down to how you are presenting yourself. How you dress, speak, act, custom your car, express yourself. Some of the people I see getting in trouble here, have the "thug" look (not saying that they are thugs, just give off the general look), and if the cops know that they have had problems with the "thug" people, they are naturally going to be suspicious of another person looking/acting that way.
To avoid being harassed/pulled over/arrested, take a look at yourself and your friends. Look at how someone who does not know you could look at you and what kind of message would they recieve. Ask yourself what are you really trying to express with how you carry yourself. I understand that you want to express yourself, and that we have the right to do it. I make my opinions known, I do it everyday. But you have to know when the right times are, and when to keep your mouth shut. I've been able to stay out of trouble, (for the most part,

)but it's taken me some years to learn that sometimes, I need to be quiet.
Well, thats my

. This wasn't to offend anyone who had posted before, just to be my opinion and my way of staying out of trouble. Primer, good luck with reporting your problems, I've had a really good friend have something drastic happen to her with the cops and she ended up reporting it and in the end, I think she did some good.