Actually Rebel that has happened in the past unfortunately.
Yes, it is mentioned in the article I linked to.
What I was pointing out is that it has happened only a few times, and most of those were found to be siblings playing practical jokes on each other. The article discusses all the times it really happened, and the fact that it became an urban myth that it was being done in a broad sense.
Interestingly, most of the times it really happened were near times when the Satanic Ritual Abuse scare (myth) was going on too.
Some pranksters were playing upon the mass hysteria at the time.
I was a jw at the time and they were all about amplifying those 2 rumors. Razor candy was one of the reasons given for not celebrating Halloween. It is a relief to be able to to put it into perspective after leaving the cult.