Just because we can answer questions about drugs, doesn't mean we have to.
We've had a similar situation with "Hackintosh" questions and concluded that
we didn't want to build a reputation for encouraging something that may or may not be illegal, so it was decided to stay safe rather than sorry.
We also had a similar discussion on Gaming regarding cheating (particularly in multiplayer games). Here the conclusion was:
I don't care about cheating in single-player games / game modes at all, but cheats in multiplayer games (including using external programs like wallhacks and such) are absolutely deplorable, and I would hate to see this site turn into a place where you can get answers to questions regarding cheats in multiplayer games.
I don't care one bit about people using drugs, I live in the Netherlands where we have legal coffeeshops and I grew up in a street with at least 2 of them.
However, I would hate to see this site turn into a place where we advocate the best way to use drugs. If you want to improve your performance, I'll gladly help you come up with a better training program, but if you decide to take the easy way out... Good luck elsewhere