Feminist campaigner Caroline Criado-Perez says Twitter needs to "get a grip" on security as it emerged bosses were likely to face a grilling from MPs.
The campaigner, who was besieged with sexually explicit threats on Twitter after she campaigned for the faces of women to be included on banknotes, said the social network was ill-equipped to handle episodes of sustained abuse and needed to work more closely with police to deal with internet trolls.
Ms Criado Perez, 29, met Twitter directors on Monday along with MP Stella Creasy who received a similar torrent of abusive messages after she offered support to the freelance journalist.
More top news
Is another prediction from the Back To The Future universe about to come true?
To the undoubted tragedy that was the killing of Reeva Steenkamp, the South Africa judicial system has added layers of legal soap opera.
Cathryn Hall is campaigning for police widows' pensions to be payable for life even if they form a new partnership or remarry.