Huh? Many moral systems do see fetuses as lives.
I don't think many moral systems truly see them as lives on the same level that adult humans are. And some don't see them as lives at all.
One should't be surprised if here where a lot of people take cryonics seriously, they will have modified pre-existing moral systems to give weight to those already cryonicly preserved.
Well, of course. I'm not saying one should be. But you're offering "many moral systems" like the populous at large is any real expert on morality. You're appealing to the authority of the populous, which is an authority that many of us think is, well... pretty dumb.
Sorry, if I've been unclear. I'm not saying they are correct in general. Nor am I even defending wedrifid's views. You seemed to ask where those views came from and I was trying to answer. Explaining from where a set of ethical/moral values arises is not the same as saying that they are correct.
Check out the latest episode of Castle (Headcase) to see Cryonics covered in mainstream fiction in a not entirely terrible manner. The details are not exactly accurate but probably not more inaccurate than similar fictionalised coverage of most other industries. In fact there is one obvious implementation difference that the company in Castle uses which is how things clearly ought to be:
Amulets of Immortality
It is not uncommon for cryonics enthusiasts to make 'immortality' jokes about their ALCOR necklaces but the equivalent on the show make the obvious practical next step. The patients have heart rate monitors with GPS signalers that signal the cryonics company as soon as the patient flatlines. This is just obviously the way things should be and it is regrettable that the market is not yet broad enough for 'obvious' to have been translated into common practice.
Other things to watch out for: