Excerpt from this article:
But an aspect which is particular to our historical moment is that anonymity, coupled with high-speed broadband connections, has enabled the internet to become a cauldron of hate and vitriol, led by men against women. In 2006, researchers at the University of Maryland found female chatroom users received 25 times more threatening or sexually malicious messages than their male counterparts. Parents were advised: “Kids can still exercise plenty of creativity and self-expression without divulging their gender.” The message? Being online is fine, so long as you don’t identify as a woman.