Two not-so-secret secrets: the new Ghostbusters has received tons of misogynistic hate, and Twitter has limped along in usage and growth over the last year. Leslie Jones, one of the main Ghostbusters and the only African American of the crew, has been fending off Twitter trolls about both her race and gender. Then she silenced her account. Celebrity exits on Twitter only harm the company's brand, and Twitter must figure out how to defend against the hatred and stupidity some users are subjected to.