Why shouldn't they be confronted (politely) about their teachings? They are in a public space promoting harmful material. THEY are the ones who want to discuss these things they just don't like it being pointed out that they are false and run away. The more the public sees the real jw's the better in my opinion.
Why not inform them about ARC, lawsuits, etc.... they sure as heck will not hear it from inside the kh.
In my fantasy land, if a jw came to my door they would be required to listen to or watch MY views about their org until I decided it was enough. If you knock on my door and expect me to listen to your spiel the least you can do is return the favor and listen to my view. But they don't, they ask you to do what they are not willing to do themselves, examine their own beliefs.