The seats are assigned. People have been standing in line for 15 minutes now. Why on earth would anyone want to stand there, when they could just sit and wait until the line clears?
I understand wanting to get off a plane ASAP, but boarding? You just end up sitting on the plane, waiting for everyone else to get on.
Stand, don’t stand, I don’t care. But I’m sitting in the marked disabled seats, with a gate checked walker, and only similarly disabled people or people wrangling little kids are getting on before me, so standing in front of me only tempts me to run into the back of your legs with my walker to bulldoze you out of my way. Leave those of us with extra trouble moving a little space, please!