Clarification: Comments or posts that violate rules in this community will either be deleted or be given a warning, the violating user would not be banned unless there's a need to. The 30-day ban mentioned in the post is for people who come into this post and argue for substance abuse, not for people who simply disagree with anti-promotion.
Suggestions for improvements to this rule are welcome, here's one:
Do not promote the use of drugs/alcohol/tobacco/weed/psychedelics/inhalants (for non-medicinal purposes).