Board Thread:Questions and Answers/@comment-35406941-20130807192409/@comment-24148835-20130908024126

Also, by checking their items they're wearing and by their stampbook. If they have a lot of rare and old pins including the Shamrock Pin, then it counts. However, if it has the Shamrock Pin but then, no other pin but except one of the newest pins, then that is pretty sure a hacker.