You're dead right, LtS, but leave out the word "almost." Hands, arms, feet and foreheads can be quite deadly. So can shoestrings, belts, pencils, ballpoint pens, laptops, cell phones, and, I suppose, pocket lint. A rolled up newspaper or magazine, and the airlines supply those.
As I said, official paranoia.
Frankly, the US should have followed the European model -- I actually felt safe at Heathrow, Gatwick, Shannon, and Dublin.