I think if we legalised all the 'safe' drugs, whichever ones you say they are, we wouldn't need to bother keeping the other shit illegal anyway.
Say we legalised Cannabis, Heroin, Cocaine, Ketamine, Ecstasy, LSD, DMT, Salvia. We'd probably be ok, no one would want to bother going underground to get the other shit. That said, we need to just stick to Cannabis. That's what we are, we need not worry about the other drugs.

P.S why were people banned? All I know is I couldn't get on for ages. Didn't know it was a ban!