Yes, autodestruct should probably be opt-in. Most people don't stick their wills to their monitors with post-its (there are other secrets in there after all, a

Yes, autodestruct should probably be opt-in. Most people don't stick their wills to their monitors with post-its (there are other secrets in there after all, and many people would like to know those); the legal system has mature tools that are surprisingly good at keeping such secrets secret until the release conditions are met. A will is a Solved Problem, with highly reliable solutions - consider the ways to prove that it is indeed to be opened. Contrast with most computerized solutions and "solutions" thereof, mostly hinging on some form of dead man's switch.