Well, whether you like it or not your ebook will be dl'ed for free and at will if anyone is interested enough. If you wish to gain profit at all, don't offer your work for free...that is certainly going to happen anyways. You are bound by your medium and the free-sharing of intellectual property is inherent.

Luckily I've never had my phone stolen. But recently I listed my old iPhone 3G on craigslist and was surprised to have completed the sale within an hour of the posting. People lose their phones all the time, but can't cancel their plans without paying huge fees. If there is this kind of demand, then there is no way that it can possibly be policed.