Depending on what you are using, you could either remap or disable the alt-tab hot key so that switching between apps isn't instantaneous or isn't nearly as easy. If you had to type in a url or make a combination of key/mouse clicks to get to where you want to, you would be less apt to bother because a: it's more of a pain and b: you have more time to become aware of your impulse and therefore you can act on it with your conscious mind. It's just a matter of setting up your desktop to work for you and not against you.

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.