@F3G:
When I see an obese person I do not think to myself "that person is ripping me off".
I think to myself "I hope s/he is not going to be sitting next to me." Which usually results in that same obese person sitting next to me. So, instead of FEDEX-ing myself
next time I fly perhaps I'll use some "reverse psychology" and think to myself "I really hope tubby over there is going to sit next to me." Hey, it might work!