Why stop there? I mean if we are going to charge people for being irritating to other passengers there are whole bunch of things that piss me off when we fly.
1. People with babies.
2. People who talk to you when you dont want them to on planes.
3. People who get up to go to the washroom frequently.

All of these things make people uncomfortable and we should charge them more. Hell what if I am uncomfortable flying when there are more then 10 arab people on the plane. Maybe all extra people who are middle eastern should be charged for making other passengers uncomfortable.

Hell maybe stewardesses/stewards find that men are more effort then women lets charge them more.

If you allow price discrimination at one level there is no reason to not allow it at others. The one exception is if someone is so large as to make the use of the seat beside him impossible. Then he is implicitly costing the airlines money.