RE: How about a "3D Waiver"?
What about just a certification for anything over 10, 15 or maybe 20lbs, maybe this could also apply to planes that expected to fly in excess of 100 MPH? Also a solo certification for planes under 10 lbs. That way someone qualified would have to certify that students can safely fly their planes, and a higher standard for larger and faster planes. The certification should include a written test to show the owner can maintain and operate his aircraft safely. This is where I think we are headed. Not now maybe, but if we start losing sites due to accidents then it will become a necessary evil.