How can I politely dissuade believers in a certain religion from repeatedly stopping over?

I’ve become a prisoner in my own home! I’ve told them that I have my own church and am not interested in discussing religion with them. They still come to my home. I’ve been hiding out and not answering the door lately, but today was the last straw.

I was sitting in my car finishing up a cell phone conversation (bluetooth in my car won’t let me continue the conversation on my cell) and the persons pulled up in the road behind me. They were laughing and pointing as in “Aha! We caught her!” I re-started my car, backed out of my driveway, and left. They followed me! Turn for turn before I finally lost them by turning left on red. Isn’t this harassment?

I’m trying my best to not bust their chops, but I’m about to totally lose my temper. And that won’t be pretty.