I'd legalise it, and other drugs like LSD too. But yeah, only for people 16+. With this though, there'd have to be definite harm reduction education at schools, as well as education on the history of these types of drugs, including their religious/spiritual use, so that kids don't always just use it to "get wasted" like they often do., and can appreciate the importance and beauty on them. Similarly, because they're legal, the people that sell them, (i.e. pharmacists) should inform the buyers as to a decent dose and stress the importance of drinking enough water, etc. I think this would be such a significant step in changing society's love of power to the power of love, and would definitely solve some world/social issues. The most important thing, however, is that i think all world Leaders (i.e george bush) should be made to take either ecstasy or LSD at least once at the outset of their term in office to bring them to a good headspace to make decisions, so they don't just go killing and fighting all the time.