Yesterday the Canadian Music Publishers Association added to the demand list by pulling out the SOPA playbook and calling for website blocking provisions. Implausibly describing the demand as a “technical amendment”, the CMPA argued that Internet providers take an active role in shaping the Internet traffic on their systems and therefore it wants to “create a positive obligation for service providers to prevent the use of their services to infringe copyright by offshore sites.” If the actual wording is as broad as the proposal (the CMPA acknowledged that it has an alternate, more limited version), this would open the door to blocking thousands of legitimate sites. The CMPA admitted that the proposal bears a similarity to SOPA and PIPA, but argued that it was narrower than the controversial U.S. bills. While that may technically be true – SOPA envisioned DNS blocking and targeting advertising and payment networks – the website blocking provisions look a lot like the legislation that sparked massive public protest.