This column is not really about Amazon violating its own terms of service by deleting e-books that its Kindle customers had purchased. Most commentators are painting Amazon's actions as some sort of isolated brain fart, but I think it's not actually an Amazon-specific problem.

Some background: The Amazon terms of use say that the company grants Kindle users "the non-exclusive right to keep a permanent copy" of the e-books they purchase. The terms do not let you resell the e-books and limit their use to the individual who bought them. The terms say that Amazon can revoke access to an e-book without notice if you violate them but nowhere do the terms of use say that Amazon can delete e-books after you buy them. In spite of this, Amazon did delete e-books for what is arguably a good reason -- it did not have the right to sell the e-books in the first place.

The underlying issue here is that Amazon, among many others, see the rules for digital as different than those for other things. It would never have crossed Amazon's collective mind to grab a physical book from you if the company had shipped you one that it did not have the right to sell. But, maybe because it could, Amazon just did what it has the ability to do without thinking to see if the ability to do something automatically meant that it was the right thing to do.

Amazon is not alone in confusing the ability to do something with the idea that it is the right thing to do. It would be inconceivable that the U.S. Post Office would be required to make and save a record of who sent and received every letter it handled. Yet, just because it can be done, a number of law enforcement officials have called for laws that require ISPs to do just that with e-mail.

It is rare indeed that buying something digital operates under the same rules as buying something physical. Amazon's own terms of use is a perfect example. If you buy an e-book from Amazon it is not really yours. That is, you are not allowed to sell it, loan it [to] a friend, donate it to a library or just about anything else that one can do with a physical book. The laws permitting this type of very limited ownership may be changing. (See "Maybe you did buy that software after all" here.)
Maybe there is a future where you can buy something digital and treat it as if you actually owned it.