Filter programs rely on a database of known adult sites. It is estimated that their are more than 50,000 adult sites with many more web pages. However, web filters are usually limited to restricting less than 5 percent of these sites. Thus, they focus on limiting the most popular or well known sites. Moreover, hundreds of new adult sites are added weekly.
Filters are unable to block sites that are new.
Taken together these limitations make the filter programs little more than a one foot fence. They block access, especially for very young children, but are ineffective for children ten or older who have an interest in finding adult material. Probably the best approach is to talk to young people about these issues. See Tips . Back to Top Surf Watch SurfWatch is software filter which blocks sexually explicit material on the Internet.