Incidentally, is it possible to sign someone else up for cryonics, if they don't object?

Obviously they have to actively consent at some point - even if only to sign the papers you shove in front of them. And then they need to cooperate while dying.

But I suppose you could do the research and fill out the form and pay for their insurance policy, yeah. But I wouldn't do that for someone who might screw it all up at the end.