Something else that should be illegal - buying 1 ticket on a flight and then being so obese that you don't fit in your own seat with the armrest down.
Q: "Excuse me GL, would you mind if I raised the armrest so my blubber can spill over onto your seat?"
A: Yes. Why yes I do.
I did relent once for a dude that literally was sitting on two armrests with 0 chance of getting his gargantuan ass between them. I let him hover there for a few minutes suffering in non-presumptive silence then offered to raise the arm.
I have logged lots of air miles and in general I am over it. Flight attendant, I paid for 1 full sardine can seat and I'm not accepting .7 seats because large Marge next to me can't stop feeding his/her face and is to cheap to buy 2 seats.
I had a flight one day with two huge dudes in the last row of a plan and an open middle seat. Yes I am lean. They both looked at me expectantly. I re-looked at my ticket which had the aisle row I almost always get. I pointed to the aisle seat and the shook their heads. I shook my head and pointed at the seat again. Same response. I gave them 'the look'. The aisle seat guy then moved to the middle and there was overlap between window and aisle flesh, and then on to the aisle seat.
I got into the aisle seat. At least I could lean out into the aisle.
Hey, 2 guys could have colluded and bought half an extra seat each and it would have been good.
If you do this, and are offended, good. So am I.