I just googled but couldn't hit it (+at work) but I remember an instance of someone editing Wikipedia claiming some known person had been found dead a day or so before it happened. Police investigated and found it was just a freak coincidence — just some guy vandalising the page. Kind of "a million monkeys" in practice: given there's loads of nonsense additions, at some point over a few years they will accurately predict future events.
This happens a lot on twitter, I follow a number of football (soccer) account and often when a shock result or event happens people search for other that have predicted it, to retweet. Also don't forget paul, the match predicting octopus!
They also often search for people (typically other professionals) predicting the opposite in order to embarrass them.
