Comment 40 for bug 528910

'''That's where the tracking tags and GUIDs in some MP3 stores' MP3 files come in, which is why I call them "spyware".'''

There can be no spyware/watermark to track anything back to an individual. Music-store users do not download the files; Canonical does, once. Canonical sends sale notifications upstream, but transfers the data once. User 10-thousand gets the same file that user 1 does.