An Autralian man was arrested after feeding hash brownies to door-knocking Mormon missionaries. The Mormons apparently got freaked out, having never been stoned before, and checked themselves into a hospital, where they were examined, probably laughed at, and released.

I think it would be a great thing if everybody started giving hash brownies/cookies to those kinds of people every time a Mormon or Jehovah's Witness cult member came knocking on their door! :)