The first is that the scientific community has not actually rejected vitrification as a form of life-preservation, and credible expert testimony claiming that a vitrified brain equals a dead human being is relatively unlikely to surface.
That is reversal of burden of proof, as in "you can't prove there is no God". You'd have to find credible expert testimony claiming that vitrification preserves enough information to reconstruct the self.
Anyway, as far as I'm concerned, people should be free to do whatever their bodies, including suicide. However, it's unsettling to me that people might want to sacrifice the last of their lifespan for a most likely misplaced hope in cryonics.
This is expected evidence. Cryobiologists opposed to the practice have consistently labeled cryonics as flawed on grounds of dealing with frozen bodies, not due to cryoprotectant toxicity. They have failed to attack the strongest version of the argument, indicating that they either do not understand it (e.g. PZ Myers conflating E-VT with K-VT) or do not have sufficient doubt about vitrification to stake their reputation on it.
In a criminal case, the burden of proof is on the accuser, not the accused. Assisted suicide is quite illegal (and even considere
http://www.alcor.org/blog/?p=2716
Previously on LW: Aug 18, Aug 25, Aug 27, Jan 22.