i'm guessing that you actually have a bunch of other sites blocked in your hosts file, as well. on the assumption that you do, do you ever see any network performance issues related to this? i used to maintain a rather large hosts file for this purpose, but eventually gave it up because i suspected that it had started doing more harm than good.
Some of these hostnames are quite arcane to me (peace.facebook.com); did you get them from a list somewhere or did you identify each one of them yourself?
