How he would work:
He would wait behind doors and when the player touches him, you have to answer 5 math questions. They are times and addition questions, and if you get one wrong you have to do one more. If you answer wrong on the first or last question, he kills you. Maybe he would have a death message saying "don't pirate next time". Or if the game is pirated he would replace Baldi, and he has a death message saying "i wonder what it feels like to be judged by your own sins"