Comment Nothing New (Score 2) 186
I know of at least one hoax from the 80's, invented for local political purposes, that made the local papers, got a memorial built to it, and now appears in several web pages and at least one documentary as fact, with all kinds of made-up details filled in. No Wikipedia page yet, but I'm sure that eventually will come.
And I guess most people here are too young to remember how seriously UFO's and Bigfoot used to be treated back in the 70's.
The only thing really special about hoaxes appearing on Wikipedia is that they can get thoroughly debunked when/if they get found out, and this is much more likely to happen with enough eyes on the issue. Without a user-maintained knowledge base, hoaxes used to be pretty much unkillable.