Twitter apologized for not being clearer about exactly why McGowan was suspended, and insisted it supports the "Charmed" actress and others in using its platform to expose sexual assault.
McGowan instagrammed the notification she received from the company, adding: "TWITTER HAS SUSPENDED ME". Sign up for the free Good Morning Silicon Valley newsletter.
Actress Kerry Washington shared her support of the #WomenBoycottTwitter movement, writing: "Starts now". The tweet has since been deleted and McGowan's account unlocked. We need you as allies.
But he and the company have said this before, and some people are just fed up.
Twitter users lashed out in her defense, accusing the company of not equally enforcing the rules against those who use hate speech. "When an account engages in abusive behaviour, like sending threats to others or impersonating other accounts, we may suspend it temporarily or, in some cases, permanently".
The idea for a boycott may have been hatched soon after McGowan's suspension by San Francisco-based Kelly Ellis, whose Twitter bio describes her a "feminist, nerd, software engineer".
"Many women have learned it's unsafe or "unbecoming" to speak their minds or flag abuse", she said.
The New York Times earlier reported that McGowan was among the numerous women sexually harassed by Weinstein, who paid McGowan a financial settlement in 1997. Combined, the two have more than 11 million followers on the platform. The model Chrissy Teigen, and the actors Anna Paquin, Mark Ruffalo and John Cusack also said they would take part. "I won't be live tweeting the premiere of Jane the Virgin tomorrow".
Her Twitter account, where she has been the most active and outspoken, was temporarily suspended this week, and while Twitter says it was because one of her tweets violated the site's terms by including a private phone number, McGowan has suggested that it has to do with her calling out Weinstein.