Twitter wants to crack down on 'dehumanizing language'
https://money.cnn.com/2018/09/25/technology/twitter-dehumanizing-speech/index.html
Theoretically, it's impossible to remove all of the malignant tweets manually.
So, the company has to rely on the automatic detection system. Then, accuracy of tweets removal depends on that of the system. Therefore, how twitter thinks about dehumanized words is no longer backlashed, but the system itself will be criticized. Otherwise, a company which created the system will be backlashed.
