Stephen King's fictional evil clown, 'Pennywise', from the town of Derry, was inspired by real-life events.
Coulrophobia, the fear of clowns, affects around 50% of adults, with varying degrees of apprehension around clowns.
If the clown is a demonic supernatural entity that brutally slaughters children, creates carnage in its wake, and is named 'Pennywise', then it is safe to assume that the percentage would be much higher.
Stephen King created 'Pennywise' in his 1986 novel IT, which has been a subject of nightmares for both children and adults.
The author's inspiration for mixing dark horror with colorful clown narratives came from real-life events and people.
Author's summary: Pennywise inspired by true crimes.