It is only a certain kind of harrassment that Twitter has a problem with, that against its friends. [1]

Celebrate cops being murdered, that's ok.

When Condé Nast employees express death wishes

https://i.sli.mg/XfKOEs.jpg

Or Sony Film stars incite mob violence

http://web.archive.org/web/20160721232327/https://twitter.co...

There is a significant silence.

[1] http://www.breitbart.com/tech/2016/07/20/twitters-history-ce...