http://kittens.iykpqm7jiradoeezzkhj7c4b33g4hbgfwelht2evxxeicbpjy44c7ead.onion/issues/content-blocking
Government actors can block or tamper with domain names, filter and block specific keywords, block a particular IP address, or urge online content providers to remove content or search results. Often, governments rely upon commercial software to do the job for them. Products readily available on the market for use in homes, schools, and libraries have been used in several countries.