I've come across the online spat between several bloggers and the the Burszynski clinic about the cancer treatments that they offer.
It started with a teenager, Rhys Morgan, and has been picked up by the Guardian.
The clinic got a bit upaset about this and Rhys has posted the correspondence on line , in a post entitled 'threats from the Burszynski clinic'.
a good summary of the whole treatment and why it has not been pursued more widely by the scientific community (from here)
Burzynski’s results have not been replicated by other researchers, and the cancer research community does not seem interested in his work. This is not because of any conspiracy – they just recognize crap when they see it
A few more internet references :
Comprehensive list of internet references and other articles
Some history of antineoplastons and Dr Burszynski
A Summary of some technical details about antineoplastons from quackwatch
I think the appropriate response would be to refer the Burszynski clinic to the case of Arkell vs Pressdram