During the days of Khaleefah Haroon Rashid a certain madman claimed to be Allah. The people brought him before Haroon. He scolded him, “Idiot! You are a human and you claim to be Allah! Don’t you fear Allah? Don’t you know that last month a man claimed to be a prophet! I hanged him!”
The man: You did well
The man: Because i never sent him as a prophet
The people laughed. Then Haroon sent him off to a psychiatric facility.