My Kid Could Paint That - Filmmaker's role?

After watching "My Kid Could Paint That" on Friday (and after our short conversation during seminar) I was still left with lots of questions. One thing brought up both in the film and in our discussion was the role of the filmmaker in making the documentary. We talked about this before with the bridge/suicide video (should the filmmaker have intervened when filming people jumping off the bridge to save the people or should he have been completely distant - and could he have done the latter?) but do you think that his involvement of himself in the film helped the family's cause, hindered it, helped him answer his own questions etc? Basically, how do you think his intervention changed the film as well as others' perceptions of the family?

By the way...people who didn't see it today: Mr. Malone says you will be watching it in January. You can go to the website to see her paintings and some of the story though.