I don't get bothered by roaming evangelicals anymore once I stopped answering the door. If I'm not expecting someone, I don't bother answering. 99% of the time it's a salesman or a bible thumper anyways. Yeah, I guess you could say I'm a bit anti-social.

Honesty, I don't mind them. They are only doing what they feel they must. So long as they respect my wishes when I politely say 'no thanks', all is well.