I am only SLF, but it seems to me that putting the baggage back in the hold would help to mitigate a lot of the problems. Granted that battery powered items are an exception, but with the fees the airlines are charging, passengers are dragging all their worldly possessions into the cabin with them. If those fees were eliminated, undoubtedly a lot of stuff would be checked, instead. It would make life easier for the flight attendants, lessen the chance of heavy bags falling on someone in turbulence or a crash (and keep people from bringing their bags in an evacuation), and there would be less for the security scanners to check, presumably allowing them to do a more through job and speeding up the lines. Is there a legitimate reason (besides greed and the fact they can get away with it) for the airlines to NOT want luggage in the hold?