> There's an increase in potential negative consequences. More people with guns, more chance for "security" to pick on someone they don't like. If you go off on your own and you're right, you don't gain much - if everyone gets on the wrong plane or goes through the wrong gate or what have you, there's not much they can do. If you go off on your own and you're wrong, you might get beaten up, kicked off your flight, held without charge until you dehydrate, banned from the country...
Umm wut? You live in North Korea or something?
Here in Europe things are pretty mellow, there was a while after 9/11 when the security was pretty heavy-handed but luckily things are back to normal and we are now again innocent until proven guilty. We have things like rights here.
But beaten up because you walk around in the wrong public area of an airport?? That did not happen even then.