the question of regulation is absolutely valid, and I do not disagree with your intent.
I am wondering, though, about the way such assessments and regulations can practically be accomplished. Obviously, it would be left to the states to regulate. Speaking for what I observe in North Carolina, our regulations and the enforcement thereof are being gutted, and I cannot see how this could work in the face of budget cuts. Regulations without teeth to enforce them are not worth the paper they are written on.
We (as an industry) may be able to do more work educating consumers (even though it is still a caveat emptor) on exercise safety. But we also have to put some burden on the consumers some of whom put themselves in harms way in their selection of exercises.
Only today, at my well-respected club where I teach classes, I observed a young man squatting with bad form. He has been approached by just about any staff member on the floor in a variety of ways to point out the potential of injury. Did he listen? NO!