As a non-jw, I was interested in the evolution of the door to door work.
In my research, yes, I learned that this whole scam started off with Russell who created a printing company under one corporate name, then started writing magazines under another corporate name then claimed that he wasn't making profits off of the magazines. Hmmm, but he HAD to pay the printing company - that he owned. Brilliant. He was followed by a truly religious Rutherford who realized through his college experience in selling encyclopedias how profitable door-to-door work could be and that got rolled in... These two? What was their religion? Money... Still and yet, being wrong, for some, despite Deut 18:20-22 could be forgivable...
BUT, the most insane piece I've read was written in a Watchtower of July, 1943 describing the mapping of territories. ANY non-jw who reads THAT? End of discussion... IF a conversation continues?... Compare that article with Ezekial 13... Case closed.
There are NO scriptures that say Jesus went door to door. John 18:20 screams the opposite. Luke 10:7 infers the opposite. History says that Christians caught proselytizing in the early centuries were fed to the lions. So... "early Christianity is not being mimicked... you're being lied to," is my mantra.
As for teaching, my experiences of the temperament of the JWs I've spoken with suggests that quite a few need to serve in a different capacity. James 3:1 suggests the same.
imho