I think a sub-forum in the adult section is a good idea, but not exactly called "drug section". This is a forum with alot of subject matter covered, so while people might think it's wierd, I don't think they would put too much thought into it. Maybe call it "other illicit subjects" or something xD
I feel bad that I started this lol I put up the board about me trying shrooms and not 20 minutes later, it was a marijuana debate and the next day there were I think 3 boards debating/pertaining to marijuana @.@