There are chatrooms for unofficial drug talk and harm reduction. Tripsit.me comes to mind. PM if you want the details.
Thing is, it is mostly populated by the same people and becomes a small, tight-nit community that ends up forgetting its primary mission. It basically is a chatroom to talk to other people while you are on drugs. Guidelines are nearly impossible to enforce. Also, it is heavily populated by minors experimenting with drugs for the first time and comparing stories. It is pretty cool, but for people looking for more in-depth discussion it is pretty whack. If you are an experienced drug user, it is not a place you want to be. A lot of it is drug dick sizing between high school kids. If you are older than 20 it's also not a place to be. Most of the discussions revolve around RC's, bitcoins (and a website people like to use them at), and where to acquire substances.
I just think that BL's mission would be lost. All that being said, there are very cool parts to Tripsit. Mainly, the tripsit room. If you are on drugs and need people to communicate with for whatever reason (including freaking out) there is place to go. The tripsit room is almost always empty though.
PM me.