A white man called her kids the n-word. Facebook stopped her from sharing it.

"The coalition has gathered 570,000 signatures urging Facebook to acknowledge discriminatory censorship exists on its platform, that it harbors white supremacist pages even though it says it forbids hate speech in all forms, and that black and Muslim communities are especially in danger because the hate ­directed against them translates into violence in the streets, said Malkia Cyril, a Black Lives Matter activist in Oakland, Calif., who was part of a group that first met with Facebook about their concerns in 2014."