Well, I hate to see all the Christmas threads, too. Over the last three days, there have been 28 threads running with the words "Xmas" or "Christmas" in the title - the most I've ever seen. I think we may be going through another one of those cycles where people seem to be compelled to start scads of new threads instead of simply posting to existing discussions. Some of these threads are legitimate discussions of Christmas songs or customs, but most are just everybody checking in to say Merry Christmas to everybody else, which is hardly profound or interesting.
Now, if I were to combine those threads, I would have to move every message individually. I do it with music threads when there's a reason to keep information together for use for reference - but I hardly think anybody in his/her right mind is going to search the forum for Christmas greetings two weeks from now.
So, I guess it's one of those silly, redundant things that people do. Maybe we all need to develop a Zen attitude toward Christmas.