Is it really unethical to buy a DRMed ebook? Seems to me I only hurt myself with it - unless you count the bigger picture that I am contributing to a future where everything is DRMed. But I think the latter might be overblown. Even if people buy DRMed books, free books still exist.

Not sure about the sweatshop story, but at least with ebooks the workers have to sweat only once, when they ship the kindle.