It's almost all inadvertent. The public is somewhat confused about the rules.

I just don't think pre-9/11 you would have seen that.

I doubt (passengers) are behaving much differently.

Rules are for the obedience of fools and the guidance of wise men.

Rules are mostly made to be broken and are too often for the lazy to hide behind

Nothing travels faster than light, with the possible exception of bad news, which follows its own rules