sentences:  Other keywords on notable topics which are blocked by the program include the names of several notable critics of Scientology, including Robert Vaughn Young and Keith Henson, as well as several hundred other frequent participants in the alt.religion.scientology newsgroup, together with terms like Suppressive Person, and Lisa McPherson.This screening process is not limited to the viewing of Web sites, however.It also blocks users from discussing these forbidden keywords on chat programs such as Internet Relay Chat.