See No Evil: How Internet Filters Affect the Search for Online Health Information
With a case pending before the U.S. Supreme Court challenging mandatory filters in libraries, the Foundation conducted a comprehensive study that indicates Internet filters most frequently used by schools and libraries can effectively block pornography without significantly impeding access to online health information - but only if they aren't set at their most restrictive levels. As filters are set at higher levels they block access to a substantial amount of health information, with only a minimal increase in blocked pornographic content.
