On my flight I had to stand up to let another passenger pass. I noticed he went sitting in empty seats with leg space and decide to do the same. Other passengers had also already moved seats. I am 1.85m, big and am so cramped in the standard economy seats that I needed to go to the doctor many times before for fluid buildup in my feet. I only sit there a few minutes and a whole army of stewardesses an the female head purser miss San Gabriel shows up to remove us to our original seats. I was willing to do that and did it effectively but apparently this is not enough. A lecture follows. "It is not fair to passengers paying extra for those seats". But it is not fair to have to sit cramped because one is taller neither. "You should ask for a seat with legspace". I said this is now the case but you send me back. Miss San Gabriel feels the heat coming on and runs off. Also the trays are in one part without hinge so I have to hold my food in my hand. I was offered to move to another seat 2 times...with the same leg space and the same tray. Asked for an apology for being treated like a fool but got none. Miss San Gabriel would make a note about me she said. Back in elementary school !