Do I feel bad when I have to pay $7000 for a C seat while 50% of occupants are sitting on the same seat with variety of creative ways that cost them less than $1000? Honestly, I can care less.

People need to let it go about price differentiation economic of scale of airlines. In Y class one person can be paying full-fare $2500 while another person got a $300 deal. In C class one person can be paying full-fare $10,000 while another person got op-up or using cheap AA points. In F class one person can be paying $18,000 while variety of creative ways to get in there. Why are we upset about that?

The only thing that gets me upset is the quality of the cabin in general. Provide a consistent good service all around, and I don't worry about how people across the aisle got his/her seat.