Really wonderful. In those settings, they really are a captive audience. I've tried to ask questions and talk to JWs who come to my door. They are quick to leave. The first hint that you want to talk and they are outta there.
The last time they did that, I did say to them as they were high tailing it on out that as soon as someone wants to talk to them they leave. I asked what kind of message that sends.
And, as our dear Outlaw says, the Jehovah's Witnesses are the only people who come to your house and knock on your door to tell you that they can't talk to you.