The way I get rid of these people (especially Jehovah's Witnesses), I straight up tell them I worship SATAN, then close the door on them. lol My brother one time also told them he was Satan Himself. haha Another thing you do is as soon as you see them creeping up to the door, bump some gangbangin BrothaLynch, X-Raided type shit or play some hard ass deathmetal. lol