Every one of us does things that would be inexplicable to a stranger, hence the saying, ‘It’d be a dull world if we were all the same.’ A mature adult knows that ‘inexplicable’ isn’t the same as ‘wrong’ — you use ketchup, I loathe the stuff but drown everything in Tobasco; you say grace, I’m an avowed atheist; you like puffer-style ski jackets, I like thick denim; you wear a hijab, I wear a flat cap; you have an American flag in your lapel, I have a badge that says ‘KEEP LIBEL LAW OUT OF SCIENCE.’

The TSA’s screening procedure tells them that any time they see something they can’t explain, they should refer that person for a humiliating secondary screening. For people who have something about them that is apt to be outside the direct experience of almost all screeners (people with urine bags, prostheses, disabilities, out-of-the-customary binary gender expression; specialized hobbies or vocations; visible political or religious observances; quirky personal fashion), this is tantamount [to] punishment for not being ‘normal’ — where ‘normal’ is whatever goes on in the narrow experience of J. Random TSO.

‘See something, say something’ and similar programs are the reason that nervous air passengers are allowed to disrupt or even ground flights because they mistake dovening Hassidim for Arab terrorists working themselves up to a suicidal rush or because they mistake a hipster food-photographer’s ‘ATOM BOMB’ tattoo for a sign of suicidal intent.

In other circles, we have a name for the philosophy whose fundamental tenet is, ‘If you don’t do this yourself, it’s probably dangerous’ — we call it bigotry.