Well it actually did turn out to be a hoax. See the following video where she was secretly tapped walking fine, playing with her dog, driving, shopping. When confronted she went into a baloney british/australian accent and blamed that on her "congnitive issues" and then walked away sideways after her interview was done(she walked fine towards the camera initially). http://www.youtube.com/watch?v=wwlRwGQl5x4&feature=related

Unfortunately all she is doing is reducing the credibility of the anti-vaccine movement.