My opinion

It depends on the person.Everyone could be effected.Others are effected negatively,others positively and others might not be effected.What I mean is that some children may play violent video games and behave violently to other people(negative).Someone else might behave as he behaved before watching a violent movie or playing a violent game(not effected).In the end somebody else by watching a violent movie or playing a violent game they change their mind and they reduce the hours they spend about them because they think of them as something useless(positive).