A while back, I forget who, but someone tracked down some false facts that were supported by circular references in Wikipedia. Wikipedia doesn't allow you to c

A while back, I forget who, but someone tracked down some false facts that were supported by circular references in Wikipedia. Wikipedia doesn't allow you to cite Wikipedia, of course, but the trickster added an unsupported, false fact to Wikipedia, which was quoted by someone's blog, which was quoted in an article by a "science" "journalist", and then the trickster updated the Wikipedia page to reference that article. I think it's important to take note that this can happen instead of dismissing it as childish pranks. We should apply the "security mindset" to our sources of information, not just to our computation.