I don’t think people need to be singled out with regards to this but I was unfortunate to be sitting next to a very large man on a flight recently. I was constantly being squeezed throughout the flight; therefore I didn’t get the level of service or indeed the room I had paid for.
Obese people for whatever reason already have benefits like disabled badges, and incapacity benefits (granted not all of these individuals want them) so it seem that sometimes they (again some of these people not all) are quite happy to benefit from their situation.