Currently many private companies offer software-based web filtering for home use. [[Public school]]s in many US states are required to employ web filters. Most [[private schools]], and employers also choose to use web filters. Some [[libraries]] also employ filters, but most do not because they see it as censorship which most librarians unilaterally oppose. | Currently many private companies offer software-based web filtering for home use. [[Public school]]s in many US states are required to employ web filters. Most [[private schools]], and employers also choose to use web filters. Some [[libraries]] also employ filters, but most do not because they see it as censorship which most librarians unilaterally oppose. |