What is it your are fond of saying about simple solutions and complex problems?As long as the issues -- sexual maturity, capability to give meaningful "consent", motivation of the elder party, etc, etc -- are so confused, I think Khasioch's (implied) solution of "no sex between children and adults" is the ONLY solution that makes practical sense.
(Unless of course you get your "sex-school" program, with thoroughly vetted licensed instructors, implemented. But until then, I think this is a case of:)
Often, a radically simplified approach is not to be condemned as "over-simplistic", but recognized as the only possible solution.
That's the moral of the story about Alexander and the Gordian knot, innit?