Dobbing myself in for my own DYKWIA moment today.
I know overhead space is at a premium. I never have an issue boarding as a 1K so as I really only need my laptop with me I decided to just bring the laptop bag on my flights last week. Put it in the overhead upright so tiny sliver of space. Had my handbag on my lap. The FA comes along and asks who owns the laptop I state me and she said do you mind putting it under the seat in front of you. I replied I did indeed mind. (The floor has germs, people drop ice cubes, spill drinks, etc.) The FA says you "must" put it under the seat in front of me and passed it to me. I was fuming. Did not say anything. Next flight it was allowed it's little sliver ofnoverhead space.
My flight today i have a carryon bag. You know what is in it? My laptop and lots of empty space. Yes it is a DYKWIA move but I do not want my laptop on the floor.