[1] On December 12, 2012, Google removed the option to turn off the filter entirely, requiring users to enter more specific search queries to access adult content.
[3][4][5] SafeSearch can be enforced by local area network administrators and ISPs by adding a DNS record.
[8] A report by Harvard Law School's Berkman Center for Internet & Society stated that SafeSearch excluded many innocuous websites from search-result listings, including ones created by the White House, IBM, the American Library Association and Liz Claiborne.
[9] On the other hand, many pornographic images slip through the filter, even when "innocent" search terms are entered.
[11] Google's ability to filter porn has been an important factor in its relationship with the People's Republic of China.