People sending e-mail to the Centers for Disease Control to protest the questionable content of a "Great Sex" AIDS prevention workshop discovered that their messages were never received. CDC computers blocked the messages because they contained obscene materials that violated government decency standards.

A similar e-mail filter prevented members of the British Parliament from discussing a bill on sexual offenses. The software marked parts of the bill itself as pornography, along with a Liberal Democrat consultation paper on censorship.

†