PlayStation 4 users are being warned to set their messages to private due to an exploit making the rounds. PS4 users are warning others that a private message being sent contains characters, that when viewed, force players to factory reset their consoles in order to get it working again. And it’s not just opening of the message that does it: just receiving the notification can be enough to force a reset “depending on how much of the message it parses.” According to various reddit users, even deleting the message from the mobile app doesn’t work. One user had it happen while playing Rainbow Six: Siege. “A player from the other team used a dummy account to send the message and crashed my entire team,” said reddit user Huntstark. “We all have had to factory reset. Only one of our guys wasn’t affected and he has his messages private.” According to user BorgDrone, basically, someone can ‘brick’ another’s PS4 just by using “a message designed to exploit a mistake in the code.” He goes on to explain how this works in technical terms on the reddit thread. Sony hasn’t issued a warning as of press time, but just to be safe, SET YOUR MESSAGES TO PRIVATE on your PS4 for now. We’ll update this post once more information becomes available.