Cryonics has a blighted history of not just attracting a disproportionate number of sociopaths (psychopaths), but of tolerating their presence and even of providing them with succor
Details?
I've seen a couple of cases of people disliking cryonics because they see its proponents as lacking sufficient gusto for life, but no cases of disliking or opposing cryonics because there are too many sociopaths associated with it.
For what it's worth, LessWrong has done a pretty good job of firming up exactly that perspective for me.
In fairness, I don't mind psychopathic behavior, and I'm still signing up. I've definitely developed a much lower opinion of cryonics advocacy since being here, though.
From Mike Darwn's Chronopause, an essay titled "Would You Like Another Plate of This?", discussing people's attitudes to life:
Conclusion, graphs, and references in article. As usual, I recommend reading Chronopause.com as Darwin has many good articles; to quickly link a few: