I like Christopher Hitchens' take on the quick rollout of new rules in the wake of the latest airplane attack attempt.
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.