There is a sense of power I imagine by such an individual. In the regular world, he is a nobody. All of a sudden, he is someone, an authority on the Internet, knows all the proper buzz words, eloquence in speech, etc. It's why I take just about everything said on Internet with a grain of salt. In the military they used to call such individuals barracks lawyers. It is one of the reasons why I don't post as much on the Internet. There's just no sense in having one's experiences denigrated, writing rebuttals, etc. It is a truly a waste of time, IYKWIM.