Phil... a one bag onboard rule may be the next step. I normally take two bags for business (the big one goes in the overhead) the briefcase in front of the seat in front of me. If it's leasure the backpack goes in the overhead just so I have some room in front of me. (If I'm in first or business it's just a matter of stowing the bag in the closet.)
I'll move my bag to overhead if someoen really needs room. But I too hate it when people sneak on with three or four bags (many tips shopping bags and shove them in the overheads and under the seats.) The F-A's seem to overlook this stuff, esp. around the holidays. Why can't people pack light and just put most of their "treasures" in their luggage? CATMAN