Because having 666 threads in the forum, well thats just not desireable to some people. Who believe's that numbers have power? When you start studying numbers its just amazing how much stuff relies on math...
Not to be off topic or anything but, Emol's Legacy costr 25666, we made them drop it to 25665 for good measure.
sadly, I can't study them at all. I get to hear about it from my wife though. I only have time to work, work on car, and play with kids... My wife educates me.