Vivienne Hayes, chief executive of the London-based Women's Resource Centre, a national umbrella group for women's charities, said the online abuse directed against women is "extremely concerning."
"You have to ask the question, where does this come from ... and why do some people think it's acceptable to do that?" she said.
Hayes suggests that the way that women's worth is commonly assessed in the media by their "physicalness, sexuality and availability to men" is sending the wrong message to men and women.
The Twitter threats are "one of the more serious manifestations of what appears an unacceptable level of women-hating," she said, adding that it points to a society-wide issue that is fairly deep-rooted.
Education is key to changing attitudes and making clear that the denigration of women and violence against them are unacceptable, she said.
"I hope the horrendous level of this kind of trolling is going to push this issue into the forefront" and prompt government action, she said.