Ah! I get it, then. I guess I was reading this poster as a kind of warning to recreational drug users because I didn’t put my pharmacology hat on. Thanks for the clarification. The more I interact with people on this thread, the more I see how it makes sense to post warnings like this.
I wasn’t referring to the posting of the sign as a practice, I was referring to the photo, meaning that I assume that the photo was taken in the USA. Yes, I am originally from the USA. Maine, to be exact. I haven’t been back home in about ten years. Anyway, I was referring to the place where the photo was taken, not the local customs.