First of all, to find a householder at home is rare. Second, to find a householder who actually knows the grit on JW blood & disfellowshipping at the first call is going to be even rarer.
What I think is happening, from my own still-in relatives, is that people from other religions are baiting the JWs into Bible Studies. My relatives live in a place where Baptist is king. They get into heated debates on the Bible, and then the blood and disfellowshipping come out.
I also think that many JWs don't really believe the blood & disfellowshipping crap. As evidenced by many who get blood when in need. But, this article is about appearances....