Twitter CEO says his and other tech firms have not combated abuse enough

Twitter Inc Chief Executive Jack Dorsey said on Tuesday that Silicon Valley companies, including his own, have not done enough to protect victims of online abuse, calling it a “huge fail.”

Interviewed via Twitter by Kara Swisher, co-founder of the tech news site Recode, Dorsey tweeted that he would give himself a ‘C’ grade for what Swisher termed “tech responsibility.”