When we lived in Mobile, Alabama, my dad would occasionally answer the phone "Bryce Hospital. Dr. Chisholm speaking." using his best mad doctor/evil archvillain voice. Bryce Hospital was the state mental institution in Mobile.Tell them ,I get to ride in a police car tomorrow , then say they , say if I tell them where I hid the bodies , I will get ice cream , if you use your best dumb hick voice , they won't call you again !!!
Oddly enough, people tended to hang right up.