One tool Magid advises parents to use with caution, however, is Web filtering software like Net Nanny or Cybersitter, which block objectionablecontent online.
Locally-operated websites like the Chinese microblogging services, search engines, online video websites and blog hosts, are required by the government to remove any objectionablecontent.
Advertising agencies that purchase media space through intermediary online networks require, in their contracts, specific warranties and obligations that the company's advertisements will not be associated with any objectionablecontent.