Goes the other way too. I was slapped some kind of sticker on my bag at the gate, followed by "This goes under the seat in front of you!" I said I was in exit row and now bags are allowed on the floor to which she said "I don't care where you sit, this bag goes under the seat in front of you, end of story!"
No more arguments from me, but sticker accidentally fell off of course before boarding. But had it been less frequent flyer who obey the orders of gate staff and then get told off by cabin crew, must be confusing fro them.