How to Be a Good Facebook Friend Rule No. 1: Respond By Evann Gastaldo, Newser Staff Posted May 1, 2012 12:49 PM CDT 7 comments Comments Want to avoid being unfriended? Start by responding to posts. (AP Photo/David Goldman) (Newser) – Want to avoid losing friends on Facebook? LiveScience offers some tips gleaned from a recent study: Respond to posts: If someone posts on your wall, reciprocate. The study found this to be the single most important factor in a successful Facebook friendship. Cool it with the photos: Don't post embarrassing pictures of friends—and think twice before you post anything on a friend's wall about the crazy weekend you all had, since you never know who might see it ... and judge. Wish acquaintances a happy birthday: The researchers found that people consider it more important that their casual acquaintances send Facebook birthday wishes than that their close friends do so. That's because close friends can always call, text, or say it in person instead. Don't get too familiar: If you're simply acquaintances with someone, don't try to use Facebook chat with them or post on their wall (except on their birthday, of course), because that could be considered creepy. Click for more on the study.