Originally Posted by twenex

I had a flight a couple of days ago, it was almost completely booked. I had an exit row (E+) aisle. There was a GS member in the window who got called up to F, so the guy next to me (in the middle) moved over. Great, I thought - a pleasant flight now - plenty of space to spread out.

Well, before we took off, some (huge) guy came back from somewhere behind us (not E+) and just stated "I'm going to sit there" - not rude, but certainly not a polite "do you guys mind if I sit there" question.