It's a minimally-invasive procedure to detect a minority within a minority. Those bastards are clearly giving out their intentions and their address: intentions are to blow infidels up and the address is wherever true (in their sense) Muslims live. I'd consider our Govt amiss if they did not act on such a clear warning - within the law.
You Brits forgot what the hell "harrasment" means. "You don't have to fight a Jew, you know... Just send a file of Marines to hyde his unbelieving skin and ram a piece of bacon down his throat." That's harrasment. Look at a Musim in a wrong way, and he (never she) cries harrasment. Sometines I feel like those sensitive souls need to be reminded what the hell harrasment is. And, if their crasies keep on behaving like they do, the rest of Muslims will eventually learn it the hard way.