A very good question Phizzy.
When I was young, an old lady from some creepy religious cult used to come knocking at my door. I noticed that she must have always powdered her face with her specs on. I never listened to her message, in fact I recoiled at the woman's visits.
A bit later I had unwittingly become "a study" at my JW friend's house as I liked to argue and find out about things. Then I went to the meeting and who was present; the little old cult lady.
I should have woken up there and then before I got any deeper.
As it happens the old lady was quite a sweet, well meaning but truly obsessive pioneer. A few years later she was put permanently into a home for the mentally ill.