Originally Posted by
zombietooth
I always check bags, so don't count me as someone who wants all of my stuff in carry-on so I can avoid baggage delays. I just always put my backpack under the seat because I feel like it might help others who have larger carry-ons and need the space. I don't need the space. On the other hand, I can't remember any FAs forcing someone to remove a smaller bag from the OH and put it under the seat. So I really don't think this is a widespread problem.
As someone who experienced this recently, once it happens and you try to stand up for yourself but do not want to be removed from a flight for not obeying crew member instructions you never want to risk it again, or at least I do not. It happened to me. Admittedly I am just one person so not certain how widespread it, but the post started off with someone with a similar experience and others have also commented so presumably widespread enough amongst FTers.