I believe that HDM accounts for some smallish component of why I feel threatened by cryonics, and I think this component could be easily addressed with some preparations and rituals once cryonics became more mainstream.

For example, I hate the idea of going to the grocery store to buy ice to chill a person so they can be preserved. (Because I'd rather they stay dead than buy ice? No. Something about going to buy a bag of ice with an igloo on it, intended for soda and beer, feels disrespectful.) But if an ambulance came prepared with ice, that would be great. And the development of 'normal' cryonics rituals: 'So-and-so has been cryopreserved, a memorial service will be held Sunday.'