I think we largely already have. If something is legal in society, there is always going to be some rate of individuals interested in participating. At some poi

I think we largely already have. If something is legal in society, there is always going to be some rate of individuals interested in participating. At some point, if you want the government to nanny over you and make your choices for your, just possessing the substance illegal. Otherwise, warn people of its ills, then let them choose.