I wouldn't have brought the subject up at all (in response to this particular piece of news), if I wanted to avoid offense. Cryonics is a heavily politicized issue. By mentioning it at all, you're doing the equivalent of starting a debate about libertarianism in the middle of a funeral.

Of course, avoiding the issue might kill people. Just remember that killing people quietly is generally less bothersome than yelling loudly, especially on the Internet.