NRM: "Remember, remember, the fifth of November. Given the hacker groups' affiliation to the Guy Fawkes mask, the decision by hacker collective Anonymous to take down Facebook on bonfire night seems far from coincidental. But posting a warning to Zuckerberg and co. and social gaming giant Zynga in a stern warning message earlier this week, that's exactly what it intends to achieve."
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Again, good article, bad rumor :)
As far as I remember, last year's threat was a by small sect of anonymous who acted independently outside of the standard anonymous group to attack Facebook - the 'actual' anon group posted up a press release saying that they wouldn't attack one of their sources of communication with the rest of the world for no reason and that the anonymous name was a banner for all people to use, a symbol of power over oppression kind of thing. So the original threat wasn't really an actual anon. threat I guess. The same as I'm assuming this will be too.