The Slaughter (partially lost exploitation film; 1971)
The Slaughter is a 1971 Argentinan/U.S. co-production, which was created by exploitation filmmakers Michael and Roberta Findlay, who are notorious for creating several films of very poor quality.
The film was not a success at the box office, and quickly fell into obscurity. In 1976, exploitation distributor Allan Shackleton purchased the film for a wider theatrical release, but changed the film's title to "Snuff" and added a new ending, which was made to look as though an actress from the was killed by the crew members in real life. This faux ending was advertised as though it was a real murder, and fake protesters were paid to picket theaters where the film was being shown.
This quickly caught the attention of feminists and anti-pornographic groups, who caused the film to become so notorious that it was actually banned in some major cities, like Boston. After the film was proven to be a hoax, it again fell out of the public's conscience until 1984, when "Snuff" and 71 other movies were classified as obscene in the United Kingdom.
The re-edited "Snuff" cut of the "The Slaughter" is readily available to purchase and watch on streaming services, while the original cut of the film has not seemed to re-surface in any form. "Snuff" does not remove a drastic amount of footage from the film, with the only real changes made being the new ending and a changed opening title card.