Q does not prophecy. The fact that you misunderstand his words does not make them a prediction or a prophecy.
The members of the Q group have told us repeatedly the future proves the past. This is because they post clues, not predictions. The clues can be understood only in one of two ways. Either you do serious research and investigation to connect the dots and uncover that which is hidden in plain site, i.e. it is no secret. Or you wait and see the news suddenly refer to something that Q mentioned in a clue. This latter case should convice you that digging and research is worthwhile.
No prophecy involved at all.