I've had friends consider me crazy for complaining - way after the time, I hasten to add - that I'd had a small deodorant can taken off me in airport security, which I'd then had to purchase in the duty free shop.
My wife's now tired of me complaining - again, after suffering through it in silent, stony-faced contemplation - that in any other context, I've just suffered sexual assault. I won't apologise for it; I find it extremely distressing to have my dick groped by a stranger. All because a machine went "beep" and one two many green bars lit up.
And then you look at the London olympics; where the army will be frisking people who've dared to pay money to watch events. (NB: the army presence was guaranteed regardless of G4S's cockup). The army! And in this instance, it's not like the UK hasn't decades of experience of dealing with terrorism from the IRA.
How well does all this work? Who knows, nobody's telling. I'd argue if there was anyone caught or something prevented by one of these systems, the government concerned would be singing from the rooftops. But no - it's "a deterrent." Gah.