They should just add seatbelts in the lavs and be done with it! We could even charge extra for that seat!
"Constipated? For a small additional fee, you can strap into Delta's new "Freedom Throne" and we'll be sure to scare the crap right out of you!".
http://www.youtube.com/watch?v=RljdyXeft04
"We got you covered like a Jimmy Hat!"