The digital versions of the German c't magazine (archives and iPad version) have similar visible and possibly some invisible watermarking features. Music downloaded from iTunes has your name in the Metadata. Personally, I'm fine with this, but then I was never going to offer the files on Bittorrent or whatever. I don't think you could have any serious moral qualms with this kind of soft DRM.

I certainly do share music with my girlfriend, which presumably is considered piracy by the RIAA, etc., along with ripping the CDs I bought before DRM-free music was widely available.