What’s ironic here is that this isn’t a matter of incompetence, it’s a matter of efficiency. There isn’t much of a threat of hijacking airplanes, and there never has been. It’s just that after 9/11 the spectacle of that even has caused the average person to overestimate the threat of terrorism in airports by several orders of magnitude. Therefore, while we’re in no more danger than we were on 09/10/2001, people believe that there is a danger and if someone doesn’t perform security, they won’t fly. So, in order to appease these people who don’t actually understand the situation but have the power to affect it, we all have to go through a little dance that’s designed to look very much like security. Take your shoes off. Throw out your water bottle. Has anyone asked you to put anything in your bag for them? Put your shoes back on. Take your shoes back off. 95% of weapons in carry-on luggage make it through TSA screening and onto the plane. Put your shoes back on. Take your belt off.