Joining a social network means inevitable friend requests from somebody you don't know/don't like/don't want to be associated with. Remember, if you get a request you just can't in good conscience accept, there's always the "silent no".
Editorial note: Whoa! You've found a super-old post here on BuzzFeed, from an earlier era of the site. It doesn't really represent where we are anymore, and may in fact be totally broken, but we're leaving it up as a part of our early history.