Do video games really spark bad behavior on kids

yes violent and gore videogames do effect ur chlds behavior if u play to many of them.

Violent video games affect a child's behavior as much as watching a gory horror film or reading about a murder mystery would in the sense of being exposed to violence. Although video games do affect a child's behavior, it's not the violence that can really affect a child's attitude but the inability to cope with competition and the winning or losing of a competition that truly affects the child's psyche.

(For example, if a child has never lost a competition and only knows how to be a sore winner/loser, not teaching ways to cope with win/loss whilst allowing them to continue to play highly competitive video games could encourage bad behavior when competing in real life.)

(Source: http://kotaku.com/5835768/its-video-game-competition-not-violence-that-sparks-aggression
http://gamepolitics.com/2008/03/25/study-games-dont-spark-violence-but-dysfunctional-families-do#.UYpuQ7WsiSo)