I was once 'profiled' while boarding an airline flight. It was in 1971. As I was traveling on an airline pass, I was very conservatively dressed. As my trip was from JFK to MIA, and my 'baggage' was only a Capital Airlines take on bag, the combination of dress, destination and baggage constituted a 3 out of four on the 'hijacker' profile. This I understood and when the air marshals asked me to open my bag I did so knowing that the RON kit and necessary clothing for a weekend visit would relieve them and admit myself to a seat on the flight. "Profiling" can be a most useful technique for allocating limited security resources to the most likely suspects. Or it can be a viscous method by which scare police assets are allowed to persecute probably innocent people. I have also been 'profiled' for pure persecution. I was young, and thus suspect, during the Vietnam War. So I have seen 'profiling' used well - and used for evil purposes.
Gadhafi loyalists stage rare protest in eastern Libya (Reuters)
from the article: In Israel, racial profiling doesn't warrant debate, or apologies