I honestly feel that most users would not be offended by this, but might feel embarrassed if this showed while they're showing the app to their parents or a non-close friend. However, I'm sure that Apple (or their censors) take things like this somewhat seriously, which is silly because this is the Internet! There are going to be offensive things every now and then; that's what happens when you democratize the creation of content. I wish Apple would take a more hands-off approach and just throw-up some disclaimer that "online interactions are not rated by Apple" and leave it at that.