Well nothing is SO important that you can't be able to follow a few simple rules?
I wonder if certain PAX (the vast minority in my experience) display this kind of arrogance (if it's not just ignorance) to assert some kind of self important 'badge of authority'?
It's indeed annoying, but since I know what people are like, I expect it and stop it short of making my 'blood boil'.
Doesn't make it right, but perhaps gives me an easier trip?