"obscenity filters" and their ilk never work. They're either overly strict or not strict enough, and whatever they are people find ways around them rapidly.
Case in point: I moderate a photography website with an active section on nature photography. Site owners decided to install an obscenity filter using a standard word list (dictionary system).
Suddenly conversations about certain animals became extremely amusing as the name of the species could no longer be used because it has in other context a sexual or offensive meaning.
In the end the filter was removed and moderators given more powers to quickly deal with offenders.
Case in point: I moderate a photography website with an active section on nature photography. Site owners decided to install an obscenity filter using a standard word list (dictionary system).
Suddenly conversations about certain animals became extremely amusing as the name of the species could no longer be used because it has in other context a sexual or offensive meaning.
In the end the filter was removed and moderators given more powers to quickly deal with offenders.