Online abuse is driving girls to quit social media platforms including Facebook, Instagram and Twitter, with nearly 60 percent experiencing harassment, according to a new global study, by girls’ equality group Plan International, which found that one in five girls and young women has abandoned or cut down her use of a social media platform after being targeted, with some saying harassment started when they were as young as eight years old. Al Jazeera reports that attacks were most common on Facebook, where 39 percent of girls polled said they had been harassed, followed by Instagram at 23 percent, WhatsApp at 14 percent, Snapchat at 10 percent, Twitter at 9 percent, and TikTok at 6 percent. Nearly half of the girls targeted had been threatened with physical or sexual violence, and many said the abuse took a mental toll, with a full quarter felling physically unsafe.