It also helps if you've ever been stopped by a police officer for any reason, such as a traffic stop. I've been on a couple of ride-alongs so I've also witnessed it from the officer side. When you hear of someone complaining about just being searched (as opposed to being beaten/arrested/shot), it can sound like whining. Unless you've been the target yourself and you've at least experienced how damn inconvenient it is (regardless of any racial motives from the officer). You really have to be the model of patience to go through that process and think, at the time, "Nevermind me being late, he's just doing his job!"
Imagine being stopped like that as a not-uncommon part of life, just because someone of your general descriptor did some assholish thing. Besides the search/frisk/force part, I think the most annoying thing is how hard it is to argue against that logic without sounding like a politically-correct whiner.
http://europeforvisitors.com/paris/articles/paris-gold-ring-...
(note in the link above, the writer says it happened to her 3 times in an hour. I had it happen one right after another, as if the second/third person didn't see me push the first one aside. So it's not just an Asian thing, I was just saying the rate that I perceived is how I empathize with being stereotyped at a quick glance)
There has to be a site somewhere listing them all.