AFAIK, GameFAQs puts those in there as a sort of "fanboy magnet" so that the rest of the poll is somewhat unnaffected by the irrational Nintendo haters.
If anything, I think it's just a reflection of the current state of the entire GameFAQs forums (which also says something).
Edit: I just noticed that they held polls for the PS3 and Xenon before they had the Revolution one, and both of those polls were identical, with no "joke" options. Also, they re-worded the Revolution's longest option to become "2007 or later" as opposed to "Not until 2007."
So now I basically figure that it comes down to CJayC having messed with the Revolution poll, either because he's an anti-Nintendo fanboy, or because he just wanted to piss off all of the Nintendo fans at GameFAQs (perhaps because he noticed that getting them all worked up generates more hits, like IGN does). Either way, CJayC's an asshat.