Not a fan of his personality, but I always find Hitchens a great read:
In my boyhood, there were signs on English buses that declared, in bold letters, “No Spitting.” At a tender age, I was able to work out that most people don’t need to be told this, while those who do feel a desire to expectorate on public transport will require more discouragement than a mere sign. But I’d be wasting my time pointing this out to our majestic and sleepless protectors, who now boldly propose to prevent airline passengers from getting out of their seats for the last hour of any flight. Abdulmutallab made his bid in the last hour of his flight, after all. Yes, that ought to do it. It’s also incredibly, nay, almost diabolically clever of our guardians to let it be known what the precise time limit will be. Oh, and by the way, any passenger courageous or resourceful enough to stand up and fight back will also have broken the brave new law.
Why do we fail to detect or defeat the guilty, and why do we do so well at collective punishment of the innocent? The answer to the first question is: Because we can’t—or won’t. The answer to the second question is: Because we can.