Those ratings are up to the app submitter. Apple can reject the app if they feel the ratings aren't appropriate, but it's entirely possible that some of the mat

Those ratings are up to the app submitter. Apple can reject the app if they feel the ratings aren't appropriate, but it's entirely possible that some of the mature rating levels were selected by the submitters. What I don't get is why Twitter, Tumblr, and Facebook are allowed to be rated ages 4+.