If anything, They would send their people out to blacklisted houses more readily than anywhere else.

Cause the whole reason they go door to door is to expose the young members to the "hostility" of the world outside their religion, its also why they tend to have them go out so early on weekends to do it.. to try and farm maximum annoyance, so that they are less likely to leave it and turn ever inward towards their religion, instead of outward to the regular world since the outer world is so hostile and hateful towards them, as manufactured.. Its all psyops and manipulation.

Finding the rare gullible fool to exploit/manipulate into joining by doing the door to door thing is just an added bonus, not the root reason for it.