It could mean something to their families, though. That may not be enough for it to be law, but I'm sure a lot of families would prefer that if something troubling came up after their loved one died, no one else would have to find out.

That's your opinion and doesn't answer the question at all.

At least for health records, you do have privacy after you die, apparently for 50 years: http://www.hhs.gov/ocr/privacy/hipaa/understanding/covereden...

I didn't state an opinion, I asked a question and then I stated a fact, an indisputable one that is not opinion, perhaps you should read it again.

If it pleases living people to think that they will have a right to privacy after they die, or to force other people to not pry into their dead relatives secrets, living people could easily craft a right to privacy for the deceased.

Sure they could, but those are rights for the living relatives; the dead don't exist to have rights.