OpenDNS offers quicker and more reliable Web browsing, but when you sign up for a free OpenDNS account, you can also get other features such as content/domain blocking and access to your DNS usage statistics. With then OpenDNS Domain Tagging tools, OpenDNS issued the following lists of the most-often blocked domains by parents, schools, and small businesses.
These are currently the ten most-blocked Web sites on home, school, and small business networks. Most of the blocked or blacklisted sites are about social networks, shopping, sex, religion and pop culture. This is not the same as China. In China, websites that talk about Porn, Tibet or Democracy are blocked.