I query how much use this is though. It seems that all it will achieve is in creating a sense of injustice to some people, giving the extremists further weapons, without achieving much if anything.
You can’t do it on London Transport, it is just impossible. And it wouldn’t have prevented 9/11. These people are going for gaps in our defences (gaps like the fact it was perfectly legal to take a box-cutter onto an aeroplane). If we profile certain types of people in certain places, they’ll just move onto other types of people or other places.
That may sound a bit defeatist - that’s not my intention, but I simply don’t think profiling works in these cases.
Mike