There are so many annoyances on flights. Who gets to decide what gets charged extra and what doesnt? Having someone encroach upon your arm rest is not the worst kind of inconvenience.
I would support all of the above having to pay extra if fatties do....IF it is based on inconvenience. If it is based on fuel consumption then its another matter.
The problem is, a drunk person could sober up, a baby will rarely cry for X hours straight and the noise from that or anything else could be massively cut down with some super high quality ear plugs, you can ask a tall guy trying to give his balls some space, to close his legs, you could arguably ask someone with bad BO to go spray some aftershave on himself in the bathroom(to be fair even generally unhygienic people will make an effort for a long flight).
But you can't ask a fat person to suddenly be thin and not lean across your sit, thats where in the difference lies. Almost everything else can be dealt with but someones size can not.
As for medical reasoning for being fat, theres incredibly few medications that ACTUALLY cause you to gain weight and arent' simply used as an excuse.
If a few people put on a few pounds in a study it might make it into the uncommon side effects listing, it doesn't mean anyone would gain 100kg due to it.
Glandular problems aswell, if you put on 10kg and can't find a single logical reason for it you'd be down the doctors and within a few months at most you'd be treated, maybe cured but almost certainly have it under control. I'm not sure theres a single possible medical condition or medication that can cause you anything but small amount of weight gain. Once those are identified they can be dealt with and assuming you weren't putting on weight by just eating like a complete pig, then you wouldn't gain more weight and having not been a pig probably find it quite easy to lose weight again also.
The difference is people who find any old excuse, the fact someone put on 50kg, went on medication for depression, put on another 10kg then read their medication could cause weight gain...... suddenly all the weight gain is down to the medication.
Comparing being a fatty to alcoholism is about as ridiculous it gets, in terms of justifying it anyway. Alcoholism, just like almost anything else in this namby pamby world we live in is just a bunch of drunks fighting for acceptance in the real world. you know what, don't drink to excess every night to start with, if you do end up doing that, stop, then get the hell over yourself. Basically the same that can be said to obese people.
As for people being celebrated for being obese, I'm not sure anyone, ever, has been.
A king who is obese might be celebrated, and people might say they love how he looks, but thats respecting(or fearing) the position and saying what he wants to hear, not that you love the fact the guys fat. What nonsense.
If you're going to make someone sitting in the seat next to you completely uncomftable and unhappy, the seat should be paid for by you.
To be perfectly honest, if I was going on a flight to say Australia and as a heavy guy who is not at all heavy enough that I lean over the next seat, I'd happily pay more to be guarenteed a seat in a row of guarenteed "non fatty's in that row seats" so I knew I'd be comftable on a long journey. Surely a ridiculously fat person will be more comftable themselves, when they aren't spending the entire journey with their boob flopping over and wobbling about all over someone next to them.
THe main issue is this chick (used loosely) seems to think she should just get the second seat free?