Or to make it legally even more interesting: Always run a (video) phone call with a group of volunteers, who will act as witnesses. Is this even wiretapping?

One day soon it will be routine for people's cell phones (or some similar device) to record every moment of the person's life in audio and video. Almost everyone will have a permanent record of everything they do, of every conversation they have had, with every person they meet. I can't recall where I read about this, it may have been something Negroponte wrote about.

As a society we are going to have to figure out how to deal with this end of privacy. It's bigger than just law enforcement.

The movie The Final Cut has some interesting commentary on a similar concept. In it, a neural implant installed before birth records every moment of a person's life: waking, sleeping, dreaming, etc.

Yes, I agree. But for the situation described in the article, creating a situation where you don't record anything, but just add a few more listeners would be an interesting test.