Guidelines for viewing are fine - enforcing them as law is not imo. Parents can do with the guide so then they can DYOR, but otherwise, I don't want a government making decisions on how I parent with some outdated heuristic.
Parents need to step the fuck up though.
I am yet to see any of the Texas Chainsaw movies - but I have seen SAW (first only), just because it was Australian. Not bad as far as they go, still not my thing.