On the contrary, carrying & consuming weed is considered illegal in many other countries to this day and can be punishable with jailtime.
Actually, it is illegal in only a handful of countries. Many other countries haven't really addressed the issue of accepting and providing relationship status (marriage etc.) but it is still allowed.
Secondly, those two really don't belong in a comparrison.
The safest choice is to disallow the general discussion about it in public chats, because you can't tell who is reading that might be bad example to, if you're really "dying" to talk about drugs with other people i'd suggest a team chat or a discord group chat rather than suggesting that the moderation of the entire game should amuse such discussions where not everyone would like to be a part of.