But the issue here is not only the end users, but also publishers and others who could potentially make a business out of selling this authors work without payi

But the issue here is not only the end users, but also publishers and others who could potentially make a business out of selling this authors work without paying him one cent. There is in my opinion little reason to want to get rid of ones copyright, it's better then to declare that it can be used freely without charge for non commercial use for example. Or if the intention is to sell it, simply not using any DRM schemes at all.