1) The possibility
of nanotechnology causing harm to the environment is another matter entirely. According to the link you posted, nanotechnology is already
( Be sure to check out the section on chemtrails)
There is no credible evidence for what he proposes. This sort of thing is actually a common psychiatric disorder known as delusional parasitosis:
People with this disorder believe that they are infected with bugs or worms or some other form of parasite, but are not. There are other similar paranoid delusions in which individuals believe that they have been implanted with some sort of communication or tracking device, or possibly a device intended for mind control. It is common for such people to create conspiracy theories wherein a government agency, aliens, or some other powerful and nefarious organization is responsible. It sounds to me like the person who made the website you linked to has discovered a new variant of this condition.
2) Cryonics, on the other hand, is a practice based on speculations about FUTURE innovations and the trajectory of technological advancement as a historic trend. Cryonicists believe in the well-demonstrated idea that death is ultimately a result of a relatively lengthy chemical process, not an instantaneous and irreversible single event. It is believed that this process can be slowed, or even halted, with cooling, vitrification, and low temperature storage.
I know you are already familiar with the concept, but I just wanted to lay both ideas out there for the purpose of comparison. In my opinion, maintaining that these two things are equivalent is an insult.