So... I was fooling around with my friends on FFA PvP when this user named Infinity_bruh pops in admitting that he has Protection X (10) on his armor, something you can only get through hacking on the server unless youre a certain level of staff. Here, he said it in the chat. You can see what I mean in the screenshot. Please make sure he destroys his armor and weapons, as those may be hacked as well.