Twitter cracks down after 'Ghostbusters' actor complains about abuse

By Yasmeen Abutaleb and Dustin Volz SAN FRANCISCO (Reuters) - Twitter Inc late on Tuesday permanently suspended a number of user accounts for harassment, vowing to redouble its efforts to quickly thwart abusive behavior and block repeat offenders from the social media site. The move appeared to be a response to abuse and harassment that Ghostbusters actor Leslie Jones, who is black, said on Monday had become so severe that she was quitting the service. Among those banned was Breitbart tech edito