Some good points on both sides of this argument. I would disagree with my friend CIN-C though that profiling doesn't work. I have first hand knowledge that one local Police Dept. has been "ordered" to tail teenagers, especially boys, and check them for wants and warrants as a routine matter. And if you happen to be driving an old, unattractive car in this particular city, you're screwed, glued and tattooed, Dude!
The drivers behavior is immaterial to them, they're profiled because of who they appear to be and because statistically they are most likely to be doing something wrong
...just my two cents.