Here's the Anti-Marijuana Tract Some Lady Gave My 3-Year-Old Trick-or-Treater - 2014-10-31
The last page of the tract says that "millions of copies of booklets such as this have been distributed to people around the world in 22 languages." The publisher is the Foundation for a Drug-Free World, a Los Angeles–based nonprofit.
Naturally, I went to the Google to figure out what the heck was going on. Short answer: It looks like Scientology dressed up as a drug warrior this Halloween.
You can read a little more about the Foundation for a Drug-Free World in their own words on an official Scientology site here, or on Wikipedia here. But essentially the organization is a way to grab people with substance abuse problems and funnel them into Narconon, which promotes L. Ron Hubbard's rather unorthodox views about addiction.