Snooping on users during e-commerce transactions, sure.

But recording user's detailed interactions with every ebook? I hope that's a big surprise to your average Kindle user.

It would be great to see a data request response and how much of this data is retained and for how long. It's clearly not anonymized at the request level.

Very easy to see a future where just reading certain books or reading certain books too many times could flag you as dangerous or be used to support a mental incompetence hearing resulting in loss of rights.