She noted that "If one of these copy-protected CDs was played on a computer connected to the Internet, it was capable of reporting back to Sony BMG information such as when the CD was played, the IP address it was being played at, and whether and how often attempts were made to copy it."
The letter closes with concerns about proposals that would require Canadian ISPs to cooperate with copyright holders who are investigating alleged infringement on their networks or face a fine of up to $10,000.
"Allowing a private sector organization to require an ISP to retain personal information is a precedent-setting provision that would seriously weaken privacy protections. When this provision was proposed in a previous proposal to amend the legislation it did not include any threshold that had to be met before the notice could be issued, nor did it provide any means for the ISP to contest the demand to retain the data. The extended retention periods create additional privacy concerns."
You can read the entire contents of the letter on the Canadian Government's Parliamentary Activities webpage.