This may be somewhat besides the point of the OP, but "cryonics" + "social obligations" in the context of the old headache about the popularity of cryonics reminded me of this:

The laws of different countries allow potential donors to permit or refuse donation, or give this choice to relatives. The frequency of donations varies among countries.

There are two main methods for determining voluntary consent: "opt in" (only those who have given explicit consent are donors) and "opt out" (anyone who has not refused is a donor). Opt-out legislative systems dramatically increase effective rates of consent for donation.[1] For example, Germany, which uses an opt-in system, has an organ donation consent rate of 12% among its population, while Austria, a country with a very similar culture and economic development, but which uses an opt-out system, has a consent rate of 99.98%.[1][2]

~ Wikipedia on organ donation