Originally Posted by Lord Mahoney
Digital watermarking is a slippery slope. They certainly have the ability to make it visible, for example, when you try to print the ebook, or once a book has been transferred to more than 10 devices, or under any other arbitrary circumstances. And 99% of users will not read the terms to know when this stuff will kick in.
Depends on how far a publisher is willing to slip. From what I've seen, most watermark-based DRM schemes are more passive than that.