I was on #1926 from MCO-DCA yesterday. When I boarded, a grossly obsese woman was in my window seat, #6A. She told me that the flight attendant moved her there, saying she "would do better in the window and not her center seat". I had no choice but to take her center seat, as the flight was 100% full. For 2 hours, I had to lean into the guy in the aisle seat. Also, I could not lower the armrest between the fat lady and me, because she also occupied 1/4 of my seat!
USAIR - get smarter about how you treat your paying customers. Your flight attendant did not ask me if her decision was okay...she did not even know if I was obese or not, so her actions were not logical.
I had booked this seat 6 weeks ago, but USAIR was quite happy to give someone else it without any concern for their actions.