Facebook, in my opinion is the world's leader in porn and porn spam email, in the 10s of thousands of emails a day. Can not get help from Facebook on how to filter or limit the porn. Even writing to Facebook VIA USPO is no response. No one knows how to limit the porn or what filters to set. The porn via Facebook is totally usacceptable and not able ot be stopped until accounts are closed. There should not be any company with any moral value that should advertise on Facebook or at least they remove their porn and post education to users on how to limit or remove or block porn and porn emails.