Some do oddly enough. Being drawn to the defensively hostile offensively offense seems to energize them. Many times the same engagers engage at the same level. What joy they derive therefrom is puzzling.
Living in the world of defensive hostility must be enervating for the hostile sorts. Why do they continue to engage in it? What are they getting out of it?
Well surely something is gained or they wouldn't be doing it repeatedly.
Maybe they were all very obedient children and this is the deep-rooted scairdy cat black sheep desire coming out in them without any worries of being punished for it?
Maybe the hostile guy is henpecked at home and put down by his boss at work. Where does HE go for venting? Not at home. Not at work. How about in the anonymity of an internet social site?