Specifically, 80% of users who have profanity on their Facebook wall have at least one post or comment with profanity from a friend, while 56% of the posts with profanity on a user's Facebook wall
come from friends. According to Reppler, the most common profane word on users' walls is derivations of the f-word. The second most common profane word is derivations of sh*t, while b*tch came in a
distant third.
All the vulgarity isn't just Facebook's problem, All Facebook insists. On the contrary, "The prevalence of profanity on Facebook walls comes at a time when employers are increasingly looking at current and prospective staff's profiles for professionalism or lack thereof."