Originally Posted by omk3
In any case, they can't really enter your house or look at your readers and say: "Aha! You bought this as a kindle book and now you read it on your sony! Busted!" Or can they?
Actually, the IBSN number is different for each format type. And I've noticed that my eReader and (I think) Mobipocket ebooks have a note in the copyright section about being an eReader or Mobipocket edition.
The average cop today probably wouldn't know the difference, but it doesn't mean they couldn't figure it out.