Script Summary: hides all other user's rep, badges, and gravatar.
Hides all user's rep, badges, and gravatar on stackoverflow, serverfault, superuser, and meta.stackoverflow. Does not hide your own badges and rep in the question header.
Reason: When I look at answers, I often take the user's reputation into account on whether I upvote them or not. This is a terribly bad thing to do as you should vote on answers based on quality, and nothing else. (it also keeps me from getting distracted looking at other user's rep :p ). So here's a greasemonkey scripts that hides other user's rep, badges, and gravatars (except your own badges and rep in the header). The relevant information, like their username, when the question was edited, and their accept rate, are kept.