Even the filtering manufacturers admit it is impossible to block all undesirable material. The Web is too vast and changes too quickly for filters to be effective. There are three billion publicly available Web pages. The average life span of a Web Page is approximately 44 days. In addition, everyday, four to seven million new Web pages are created, and some 50 million existing pages change their content.
Filters give parents a false sense of security.
For all of these reasons, then, filters are not appropriate for libraries. Rather than filters, the American Library Association believes the solution is education . It is only through education that young people can learn self responsibility which ultimately is the internal filter that is going to stay with them throughout childhood, young adulthood and into maturity.