Twitter has come under fire for failing to protect women against online violence and abuse in a blistering eight-chapter report published this week by Amnesty International.

The report, titled “#ToxicTwitter: Violence and abuse against women online,” analyses what it’s like to be a woman on the social media platform, following a 14-month study examining 86 subjects in eight countries.

It found women and nonbinary people faced hate speech, violence and threats. “The violence and abuse many women experience on Twitter has a detrimental effect on their right to express themselves equally, freely and without fear,” the study says. “Instead of strengthening women’s voices, the violence and abuse many women experience on the platform leads women to self-censor what they post, limit their interactions, and even drives women off Twitter completely.”

Almost one in four women said they faced “online abuse or harassment at least once” and more than half of their attackers were strangers to them, the study found.

“Some of the things that have been put on Twitter about me have had people say they know where I live, I’ve had people say that they’ll be outside my work, I’ve had people not just threaten me but also say things that, you know, are clearly veiled threats against my family,” journalist Allison Morris said of the threats she had received.

UK women’s rights activist Sian Norris described how she once tweeted about how much she disliked an Amazon advertisement featuring British broadcaster Jeremy Clarkson and was told to drink floor polish as a response.

Journalist Imani Gandy explained her experience on the platform as a woman of color: “I get harassment as a woman and I get the extra harassment because of race and being a black woman. They will call white women a ‘c*nt’ and they’ll call me a ‘n—-r c–t’. Whatever identity they can pick they will pick it and use it against you.”

The report also found the abuse and violence – and Twitter’s inadequate response – was causing a “silencing effect,” where women were self-censoring what they post, either limiting or changing their online interactions. Or, in some cases, it was driving women off the platform altogether. In handing down its verdict, Amnesty International also offered some solutions to fixing the platform’s problems for women. Suggestions included getting Twitter to be more transparent with data and information about the prevalence of violence on the platform; or, reporting structures to have “consistent application and better response to complaints of violence and abuse.” Lastly, having Twitter play a more active role in teaching users how to use the existing privacy and safety features, such as muting, blocking and keyword filtering.

In a statement, Twitter said it agreed with “many of the recommendations” contained in the report. The statement read: