My mother used to tell me that the jehovas witnesses had like a blacklist of households that they are forbiden from knocking on their doors since their inhabitants are unsalvable (and are going to hell according to the list but mom didnt say that) and that the peerequisits of being added to the list was not opening the door when they came to pester our house hold.
We laughed a lot about this until one day i bring it up back again and shes like "what are you talking about m8?, Theres no such thing, i made that up, i cant believe you belived that was a thing." And then she started laughing at me and made fun of that the whole day but like in a good way.
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.
Any time JWs come up in Reddit there's a bunch of people saying tell them you've been disfellowshipped, and then they're not allowed to have any contact with you and won't come again. So maybe this one is in fact true.