David Cameron has called for a boycott of websites that don't tackle bullying and abuse, following the death of 14-year-old Hannah Smith.
"The people that run these websites have got to step up to the plate, clean up their act and show some responsibility", Cameron told the BBC.
"If websites don't clean up their act and don't sort themselves out," the Prime Minister continued, "then we as members of the general public have got to stop using these particular sites and boycott them."
Cameron doesn't elaborate on exactly what "cleaning up their act" means, given that social networks don't currently regulate what their users post.
Social networks are in the spotlight at the moment. Hannah Smith's father said she was bullied by posters on Ask.fm, a site that allows users to ask and answer questions posted from other users around the world. Ask.fm allows users to post questions anonymously.
Twitter has, after a storm of harassment, hatred and threats have been directed at a number of high-profile women using the site.
Cameron recently revealedunless you contact your ISP to opt-in -- a plan denounced by .
Should websites like Twitter and Ask.fm take responsibility for users spreading hate? Can they take responsibility in a meaningful and practical way? Should we follow Cameron's advice and boycott certain sites? Tell me your thoughts in the comments or on our Facebook page.