According to this article, the British are being sensibly cynical about the whole exercise. Good points made throughout. However, according to this, the trend is not universal, as two Arabic men were hounded off a plane by racist fellow passengers. (Original article here.)
Thomas Nadelhoffer has an amusing post here, arguing that if we should profile the dangerous kinds of people, we should first be profiling politicians and their kowtowing pundits.
On a serious note, though, am I the only one who remembers Jean Charles de Menezes? How long until the next shooting -- by reason of not being white?