British PM: Facebook must 'explain itself' amid beheading vids row

Britain's Prime Minister has slammed Facebook after the social network appeared to have lifted its ban on users posting videos of beheadings – although nudity is still forbidden.

Crucially, the Mark Zuckerberg-run company does not want to be viewed as a publisher, like other media outfits, because with that tag comes responsibility about the type of material that can be posted on such sites, including thorny issues such as libel.