My observation to the post being locked is more so of the content, and of it's sincerity (or lack of) from the original poster as well. Since doing drugs IS illegal in most states and countries, and it's not a good idea to suggest any influence of using it for younger people, I'm sure the monitors had their checklist as to whether or not it should be left alone, or locked. Considering it seemed to stray from the point, anyway...who knows where it would've gone!
Personally, I liked the sarcasm to it, though!