Well first of all, any addiction is bad. Gadget addiction being bad as well shouldn't surprise anyone. Also it would have been nice if the links to your sources would actually lead to the articles/statistics you have your information from and not just the sites the they are supposedly from.
Besides from that I take issue with the assumption that it negatively influences a child's morale. If they really became psychopaths after seeing a gruesome video on the internet then they most likely already had psychopathic tendencies to begin with. Children aren't stupid and most children know that what they see on the screen isn't really happening anyway. But maybe I am wrong, if so prove me wrong by showing scientific research.