I think that you're slightly confused. Given that they talk about Final Fantasy for near on 3 hours and have done for 6 episodes, I would hardly say they are "fake fans".
I think the term you're perhaps looking for is that they are not "sad losers" who feel to the need to make sure their knowledge of the entire Final Fantasy universe is second to none so that their virtual ego is satisfied.
Instead they're more modern fans, who are providing a modern service. Surprisingly enough, the website is about Final Fantasy XIII and it deals with currently issues in the Final Fantasy universe, not those in the past. It might also be surprising to note that having knowledge on previous installments doesn't really mean anything to the nature of their website unless it directly relates to current news. For example, if Firion was announced as a new character in Final Fantasy XIII then a little knowledge of Final Fantasy II might be handy, but that is quite unlikely. Having said that, he was just for Dissidia, so who knows.
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