One thing that causes problems with 22 inch bags and the sizers is that some luggage manufactures don't include the handle, wheels, and the little feet as part of the 22 inches while the sizers do. What bothers me about sizers is that one gym type bag I use for short weekend trips won't fit in a sizer because it's more than 8 inches tall (other two dimensions 12 x 18 or somthing like that) yet it's smaller than most carry-ons, it fits in the overhead bin of an ERJ and fits under the A seat too, and GA's have never considered gate checking it on COEX flights. I think NWA had a sizer that you could hardly get a laptop into.

I will agree that too many people try to bring too much, and too big stuff on board these days.

There is rumour over that the security thread that the TSA will start playing baggage size police at the check points and send you to check the bags if they feel your's is non-compliant.