"All the big music sellers may have moved to non-DRM MP3 files long ago, but the watermarking of files with your personal information continues. Most users who buy music don’t know about the marking of files, or don’t care. Unless those files are uploaded to BitTorrent or other P2P networks, there isn’t much to worry about. A list of which music services are selling clean MP3 files without embedded personal information, and which aren’t, is here. Apple, LaLa (owned by Apple) and Walmart embed personal information. Amazon, Napster and the rest have resisted label pressure to do so. ..."