Seems Emoji aren't the only thing being scrubbed from the App Store today! MacRumors is reporting that old reviews made my users who hadn't actually downloaded the app they were reviewing are also being removed. Apple stopped non-users from reviewing apps a while back, this is just retroactively applying the new policy to the old reviews:
Several long standing apps have seen dramatic decreases in their review counts. SEGA's Super Monkey Ball count dropped from 4197 reviews down to 3710 while Namco's Pac Man dropped from 395 to 122.
Most everyone involved, from developers tired of no-good-nicks trying to game the system, to users tired of sorting through gamed or off-topic reviews, will likely appreciate this move. Maybe this is one rejection Apple's done right?