Aunt of bullying victim: Site has 'responsibility' for teens
Several large companies are among those pulling adverts from social media website ask.fm, after the death of a teenager who was bullied online.
The Sun newspaper, EDF, BT and optical retailer Specsavers are among those distancing themselves from the site.
Ask.fm has issued an open letter saying it does not condone bullying of any kind on its site.
The controversy comes after the death of bullied 14-year-old Hannah Smith from Leicestershire.
Charron Pugsley-Hill's 15-year-old niece, Ciara, killed herself after receiving abusive comments online.
Ms Pugsley-Hill spoke with BBC Breakfast's Louise Minchin and Simon McCoy about what can be done to help prevent online bullying.
09 Aug 2013