People have different opinions on each of the listed substances, that's fine by me. This is an anti-promotion rule that will definitely limit the discussion that people can have about them, including but not limited to:
- advocacy for these substances
- comparing pros and cons, then concluding that they're a net good
- saying that they have little or no side effects in small doses
it really shouldn’t be controversial to be asked to keep those topics in other forums.
I'm not sure what you mean by this last sentence, are there some words missing?