Steam Community has their own set of rules. The moderators over there enforce said rules. You should review them, as they specifically do not permit of narcotic/drug references.
https://support.steampowered.com/kb_article.php?ref=4045-USHJ-3810
Content Rules
Do not post any content on Steam containing the following:
- , inappropriate or offensive content, warez or leaked content or anything else not safe for work
- Any discussion of piracy will result in a permanent ban from the Steam Community including, but not limited to:
- Cracks
- Key generators
- Console emulators
- Cheating, hacking, game exploits
- Threats of violence or harassment, even as a joke
- Posted copyright material such as magazine scans
- Soliciting, begging, auctioning, raffling, selling, advertising, referrals
- Racism, discrimination
- Abusive language, including swearing
- Drugs and alcohol
- Religious, political, and other “prone to huge arguments” threads
Your second thread that you made in rebuttal to the original warning via the moderator messaging system, was considered a violation of "Openly argue with a moderator". It is also off-topic to the community hub.
It may also be worth your time reading this article about moderation policies on Steam Community:
https://steamcommunity.com/sharedfiles/filedetails/?id=143962136