Perhaps a bit off topic, but we really need to stop referring to digital books obtained through Google, Amazon, and other publishers as sold. Amazon has made it very clear in recent months that you do not purchase kindle books you purchase a license. It's a nuanced difference, but one I know this audience will appreciate.
There are well-known ways to extract Amazon books as PDFs, iTunes videos as DRM-free video files (with subtitles and audio tracks!), download youtube videos and movies, etc. Plenty of instructions on certain popular web sites that shall not be listed. So, there's an opinion that the audience you're referring to is, in fact, "buying" the books and movies, and not renting them, for as long as you are willing to exercise your technical "prowess".
And I'm telling you that your position is suboptimal and in the long term will lead you nowhere. You won't be able to switch any noticeable number of consumers away from Amazon by telling them that they lie, nor would anyone listen to you.
However, if you teach people how they can obtain DRM-free material, store it, and consume it in that format, that and only that can make the difference.
Amazon is effectively a monopoly at this point. Many books are available exclusively through them. I doubt that the US court system would look into this segment of market any time soon. They still can't decide what to do with Google, and that took them how many years? I doubt we will be able to resolve this problem in our lifetime.
I disagree. Amazon disabled the ability to download and transfer kindle books in February of this year, adding an additional barrier for individuals who commonly download and strip the DRM from the kindle books they "buy" from Amazon. When that news was communicated within a number of online communities, there were a lot of people who learned for the first time that they didn't "own" their kindle books. More importantly, they also learned about the tools to help them strip DRM and regain the ownership they thought they had.
People are slowly beginning to learn that their perception of digital content licensing and ownership is wrong. The more it is called out that they are licensing rather than purchasing content, the more we're able to explain why that is a bad things, the sooner people exert pressure to change the business or enact laws to do so.