Last month, I blogged about how Telus — a large Canadian ISP and phone company — had blocked an IP address so that its customers could no longer visit sites operated by its union, which was in the midst of labour action against the company.
OpenNet Initiative has done a report on the incident showing that by blocking that IP address Telus not only blocked access to the union's sites, but also to "an engineering company; a breast cancer fundraising site; an alternative medicine site based in Australia; and a Colorado based electronic recycling company," as well as more than 760 other domains.
(Thanks, Michael!)
Update: Site is down. email me if you've got a mirror. Back up — don't send me email!