Is this really worth making a thread about? Is it that easy for you to sip your drink and look down on others? I've seen plenty of people up front do stupid things. Do you actually know if he was in 26E? I'm sure if you brought this up with the person who so bothered you, he might take you as being a little smug.

Sit back and relax. There are far worse things to worry about than someone checking their boarding pass. There are plenty of people who are hungry and live in fear all over the planet. Perhaps you could brainstorm on how to help them instead.