Got it.
If the police would cease responding the calls will stop.
Having said that, this psycho needs to be caught and made an example of and made as famous as humanly possible.
You would need a Vlad the Impaler or Hannibal Lecter Memphis scene to exert any type of impact, i.e., "oh s**t, we've been fabricating imaginary monsters, now we have a real one on our hands.".
“If the police would cease responding”
How can the police be absolutely sure there’s not a killer out there setting up a situation where if someone calls 911 for that address the police won’t come? How would it look if the police did not respond and the next day MTG and her family are found murdered in their home? The police are in a catch 22, but they have to respond.