Some people may hate me for this, but it's just my opinion.
We were travelling back from holiday a couple of years ago, and brought back a couple of things. We were less than 4KG over our luggage limit, and they wanted to charge us £10 per KG over. Granted, it was our fault, we paid for "X" number of kg's and we went over, but we weren't exceeding the health and safety limit of 25kg (which I acknowledge is right), but the couple who were in front of us in the queue were huge people. Me and my other half have a BMI within the healthy range, but this couple were beyond a BMI of 40. (I have to estimate people's weight at work a lot, and usually about right).
We ended up re-arranging and managed, but why were we getting punished?
What was worse, was that one of them sat next to me on the plane, and constantly occupied a couple of inches of my chair with his elbows, as he literally didn't fit in his seat. The couple both had ailse seats as there was no way they could have sat next to each other.
It just grinds my gears that we would have had to pay more for literally a few kilos over with our luggage, when someone is morbidly obese doesn't pay any extra. I'm not talking about people who are a few pounds or a couple of stone overweight, nor people who are just tall, I just mean people whose body physically interferes with my personal space on a plane.