Excuse me but I personally saw this happen last fall on an Air Tran flight. In fact, I posted about it here on the DIS when I came back from that trip. I like aisle seats close to the front, so have no problem paying for those $15.00 seats that I need. That particular trip I was in the aisle seat and another lady was in the window seat. Both of us was slightly pooh size, but easily fit in our seats without spilling over. The plane was just about filled, when we looked at each other, laughed and said it looked like we may luck out and have the middle seat free. About that time this really large man (well over 350lbs, and probably closer to 400lbs) came walking sideways up the aisle looking for his seat. Even walking sideways he was having a hard time squeezing up the aisle. As he got to our row, he laughed, said "Oh no this is not going to work, lets just lift these arm rests up where we can all be comfortable". Immediately the other lady and I both grabbed the arm rests and said "No!" The FA saw the situation and came over. The man acted like he was angry, said it was obvious there was no way he was going to fit comfortably in that middles seat, and insisted that she "make" us raise the arm rests. Instead she upgraded him to a seat in first class.


Once we got home and were waiting for our checked bags at baggage claim, it just so happened that I was standing next to the lady I had sat next to on the plane. The man came up, laughed, and told us thank you for our knee jerk reaction of grabbing those arm rests. He said that almost every time he flies, people have that same reaction, no one wants to sit next to him, and so he gets a free upgrade to first class. We asked him if he ever had to pay for two seats or was ever kicked off the plane and he said never, by Air Tran. They always pretty much move him to first class or else move him to two seats.