FWIW, there's been a few tests done over the years, and none of them showed conclusive evidence that Amazon actually actively pull logs in the background. The facility is there, true, but, except when asked/done by CS, we haven't really seen it actually happening without consent. And it defaults to 'anonymous' uploads by default (using a random uuid generated at first boot, instead of the device s/n or account info). Doesn't mean it never happened/won't ever happen, but there you go
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On the other hand, they do know what you read, because I don't think I have to remind anyone that they're actually a book *seller*, so they do know what you *bought* from them
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Can't speak for Nook/Kobo/Sony, but given the nature of some of the features on some of those devices (Kobo Reading Life, in particular), it stands to reason that some/all of them do collect some kind of statistics, and that those stats *may* go back to the mothership in some form or other
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@geormes: Yes, you probably are. Not familiar with your particular devices, but it stands to reason that they didn't revamp the whole Linux/Android syslog concept, so, it's logging stuff *all the time*, it won't suddenly forget about part of the system (your sd card) [and erase all previous mentions of it, ever] just because you removed it at one point
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Long story short: If any of this bothers you, I'd suggest stepping back from any kind of computer and moving to the North Pole or something, total digital anonymity is pretty much a pipe dream, IMHO.