You need to follow the 3 second rule...if someone is standing there like a clueless fool and not moving for 3 seconds, just push around them and go on your way...no use fretting about it. I have no patience for slow idiots at the airport and apply my 3 second rule rather frequently, and no, I don't care how huffy they might get about it.

You'll find yourself fretting less with lower stress and moving more efficiently. I just wish we could legally use cattle prods which would make the 3 second rule far more entertaining.