I had my suspicions . . .
Like I said it's only a small minority, and that's why I can still be bothered to post on here at 1am (nothing to do with a knackered body clock, honest). In any group of people you'll get the odd prat or two - we tend to forget the hundreds of passengers that are polite and courteous, while remembering the occasional clever sod who announces (and I quote) "that pilot landed at the wrong angle" or "there was no need for a landing like that, they get paid enough money."
C'est la vie.