Unfortunately, there is no legal difference between sharing with Amazon and sharing with the government, according to a regular commenter. This is because you cannot (apparently) have an expectation of privacy in things you share with a third party, unless it falls under specific exceptions.
To the extent that's true (IANAL), it's the kind of thing we need to be making the first issue of. That's all I'm saying. Bringing up "the government" takes a lot of people out of the argument from the outset. It turns them off. It prompts them, subconsciously, into the "I have nothing to hide" mindset. So instead, we should talk to them about what it means to share something with any third party, and what other third parties those guys can share your data with -- and what that could mean for you, in very practical terms, with proximate, real-world scenarios.
