The last time I flew United is also the day I vowed never to fly United ever again. A couple of months ago, I was flying out of SFO. I always bought the priorit

The last time I flew United is also the day I vowed never to fly United ever again. A couple of months ago, I was flying out of SFO. I always bought the priority boarding just because I get anxious when I have to wait for things. Anyway, I was at the front of the boarding line and watched this whole thing unfold. The United gate agents were being really short with people before boarding began. Once boarding began, and some people were scanning their boarding passes, the head gate agent decided that every passenger (every single one) needed to put their carry-on into the stupid metal sizing box. But by the time he had decided this, one of the first class passengers had already gone onto the plane. The gate agent said "sir" half-heartedly down the hallway to the plane, but he must have already boarded. The gate agent guy got extremely mad, started yelling about the passenger, and got on the phone and called the airport police. Boarding had been completely stopped at that point, and we all waited for the police to pull this first class passenger off the plane. The guy was completely innocent, and it delayed our flight by perhaps half an hour. It was astonishing, even after my previous pattern of waiting four or more hours for delays on what should have been a short commuter flight.