I sort of figure that I have a right to put a bag under the seat in front of me. That's the way I travel. I always have a briefcase that goes under the seat. Seldom have anything that goes in the overhead. The once or twice I've questioned their under-seat stuff, there's been no question. But there sure might be. We need to limit carry-on to one piece, incuding womens' purses. The we can eliminate the overhead compartments and increase head room.