What does a rationalist do for Christmas (or whatever analogue is going on around you at this time)? Stay at home and grumble, "Bah, humbug! Stop having-fun-for-bad-reasons, and did you know that Láadan has a single word for that concept?"?
Attempting to light a candle instead, I am giving my teenaged nephew, who was into science but is now into history, "Guns, Germs and Steel", which combines both. Someone else (I haven't decided who) is getting "The Atheist's Guide To Christmas" which has chapters by Richard Dawkins, Ben Goldacre, Simon Singh, and the like.
What are you doing for Christmas?
My impression has been that most people who bother talking about their atheism online (obviously highly self-selected group) seem to follow Dawkins' idea that religious moderates somehow enable religious fundamentalists, and are therefore indirectly evil as well. This was always the most dubious aspect of the New Atheism.
Should we make effort to end football just because some people are overly enthusiastic about their favourite team? Nearly everything about modern society can be highly destructive sometimes, but we've figured out how to deal with it really well most of the time.
Websites about atheism are a different group of people than websites about rationality. There's overlap, to be sure, but the people who are "passionate" about being irreligious don't tend to gravitate here; my view of a typical LWer is that they may go through a phase of thinking lack of religion is worth spending a lot of time discussing, but then they move past it because it's not a very difficult question. LWers talk about their atheism, but usually only when provoked.