OK, KNEE savers? The person behind you on a seat can put a knee saver device to keep person in front from reclining? But apparently OK with the FAA but against airline policy? So what do you do when a person reclines his seat in front of you forcing YOU to recline yours to bide back some lost space from the guy in front of you taking up your space? Problem with going to all seats that don't recline, is the airlines will take that space up and add more seats. It stinks. Either buy a first class ticket or ride a bus. I see what its coming down to.

Flight Cabin Crews Call the Shots in Fights Over Reclining Seats - NBC News