Not necessarily. The hoaxer(s) may have decided there wasn't any money to be made in it after all, or that, if they were doing it for laughs, there were better things to do with their lives.
Without knowing how exactly he phrased things, I see some summaries:
2004: Civil war would erupt in the U.S., pitting militias and other armed citizen against something he called the American Federal Empire.
2014: Civil War II ends when Russia attacks the U.S. WWIII begins. The U.S. loses, and is reduced to ruins along with China and the EU.
2036: America is rebuilt and back on its feet, though considerably diminished. Then Mad Cow becomes pandemic, affecting virtually every beef-eater on the planet. Despite all these setbacks, the U.S. is in possession of time travel technology. In fact, time travel would become a reality in 2001, right after CERN's larger facility began operating.
http://swallowingthecamel.blogspot.co.uk/2010/05/5-unconvincing-paranormal-cases.htmland:
Conversations between Titor and posters on Art Bell Post to Post continue for the next few months. Titor talks of imminent problems across the world beginning in 2004 – the cancellation of the Olympics, the splitting of the United States into warring factions, an epidemic of Creutzfeldt-Jakob disease, and a series of Russian nuclear strikes in 2015 that devastate all major U.S. cities along with the European Union and China.
Titor talks about his life as well, including living in Florida as a child, his service in the second American Civil War as a member of the Fighting Diamondbacks in 2013, and the communal/agricultural nature of life in 2036.
Titor admits he lives in a parallel timeline, one that varies 1-2% from ours. Enough to be slightly different, but not diverge from the major societal events.
http://io9.com/5869362/the-man-who-told-the-internet-hed-come-from-the-future"Major societal events" are already quite different. If you think that what he/they claimed is "practically impossible to debunk", then you're basically saying that all it requires is internal consistency, and relation to what actually happens is irrelevant. Though I would maintain that a society that can travel in time, and build machines to control it, would not need to retrieve old machines to fix a software problem, and so his story was inconsistent from the moment he started it. I wouldn't rate it as semi-reputable science fiction.
The concept of travelling back in time has to rethink the whole idea of what space is. If an object travels back in time, where is it in space in the period between the 2 end points? What happens to the forces of gravity, electromagnetism etc. on the object, and what happens to its inertia? If you travel back in time 6 months, do you find yourself on the opposite side of the Sun from Earth? A bit behind the solar system in its orbit round the galactic centre?
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