I just watched the Unwitness and friggin loved it. We need more of this. They do invite the public, they do say it's personal to take part and people do have the right to stand up to a lie who's main purpose is to minimize Christ.
This is a cult who's members are not allowed to discuss, to read the Bible by itself, to think, therefore it leaves not many other options than this. And no, you can't just "discuss" with a JW, believe me, I have tried.
I'm sure there are many in that cong that are already awake and many that are on the border, have doubts etc. This can very well give them that nudge to do deeper research.
These activist should wear t-shirts with JWFacts.com printed in large on both front and back and reveal them as soon as they stand up.