Most of the time I find their approach about God very overwhelming. Two of them stood at every cross walk in my little town, I walked up the street and got preached at by 6 different people. Im a firm believer in letting everybody believe what they want to believe, and not judging other people's opinions, and im not preaching mine. They probably get a lot of doors in their faces, which would start to become tiring I imagine, so I usually just say im not interested and thank them for stopping by.