What kind of person does Keyboard Man refer to?

In reality, I am passive to Nuo Nuo, and I have been hit hard by the Internet. This is the standard description of Keyboard Man, and related to it is the word "wrangling". It can be seen that keyboard man refers to some people who are timid and selfish in real life, but habitually and intensively publish "vicious remarks" on the Internet.

It can also come from the fact that people are extremely indifferent and don't like to talk. Once out of the crowd, when they type on the computer or comment and chat online with their mobile phones, they can talk and laugh and comment on all aspects of society without scruple. Let others mistake it for this person's wisdom, humor and wit, and others are completely different after their predecessors.