We get Mormon and JW missionaries at our house! I always talk to them.......
I used to but I got tired after a few years. Pretty funny though when the muslim family moved in next door and the Jehovah Witnesses tried to talk them into Jehovah.
As long as you talk to them, they'll be back, and you'll be taking part of their evil works:
"Whosoever transgresseth, and abideth not in the doctrine
of Christ, hath not God. He that abideth in the doctrine of
Christ, he hath both the Father and the Son.
If there come any unto you, and bring not this doctrine,
receive him not into your house, neither bid him God speed:
For he that biddeth him God speed is partaker of his evil deeds"
(2 Jn. 1:9-11 AV).
Each of these operations keeps records. and if you show them stiff resistance, telling them these verses, they will mark your residence off as one to avoid with trainees. By all means, do not even wish them a good day.