Users of a sports website were encouraged to post pictures of women they wished to sexually assault to a "rape gallery" and describe what they would do to them, it has been revealed.
The gallery, in which people were asked to write about what they would do to the people featured, was in a chat forum on the not606.com website.
It led to a complaint from a member of the public to the British Board of Film Classification (BBFC), which now plays a part in classifying content which can be accessed from mobile devices.
The complainant raised concerns about near-the-knuckle humour and images with sexual content, in addition to the rape gallery.
The BBFC - which detailed the incident in its annual report, published today - said: "We took the view that, while the 'rape gallery' might have been intended to be funny, many would not find it so and, moreover, that it posed a non-trivial harm risk by presenting women as rape targets.
"We concluded that it would be classified at least 18 or R18, and might potentially be refused classification."
R18 is the classification given to hardcore pornography.
It is not clear whether the people who were pictured were ordinary members of the public or celebrities.
The organisers of the site removed the page when the matter was brought to their attention.