John Titor

This is why I love Wikipedia. Stumbling across lengthy articles like this one on John Titor; alleged time traveller from the year 2036.

John Titor was the name of a purported time traveller from the year 2036. He posted on several time travel-related Internet bulletin boards during 2000/2001, making many vague, but seemingly falsifiable, predictions about events in the near future and giving an account of his supposed native time period. Whether or not John Titor was a hoax is a topic of controversy on web-based paranormal discussion boards.