As the public concern over the Bell coalition website blocking plan continues to grow (both the Canadian Press and CBC this weekend covered the thousands of interventions at the CRTC), the case against the plan resumes with a review of why it is likely that it will lead to over-blocking of legitimate websites. Last week's post highlighted the probable expansion of the scope of piracy for blocking purposes, a theme that continues today with a look at the many incidents over-blocking of legitimate sites sparked by website blocking (other posts in the series include the state of Canadian copyright, weak evidence on the state of Canadian piracy, the limited impact of piracy, and why the absence of a court order would place Canada at odds with virtually all its allies). The danger of over-blocking legitimate websites raises serious freedom of expression concerns, particularly since experience suggests that over-blocking is a likely outcome of blocking systems. The Council of Europe Commissioner for Human Rights issued a report in 2014 on the rule of law on the Internet in the wider digital world, noting: