Honestly, this article exemplifies what is really wrong with science these days. First of all, this wasn't science, because it wasn't a controlled experiment, or peer-reviewed, before being broadcast to the global media.
Parkinson's disease is known to be particularly responsive to the placebo effect (http://www.pdf.org/summer12_placebo). Since the "experioment" (big air quotes) had no controls, we simply do not know whether chemotherapy helped them or not.
If we want people to trust the results of science when it comes to vaccination, global warming, etc, we need to ensure that overblown claims are not made in the name of science, as when they are debunked it will inevitably eat away at the public's confidence in science as an institution and as a source of justified claims.