First of all... It is horrible what happened to the baby, and it saddens me to hear such a thing.
As far as hitting a child, nature over nurture every time, until a child has the ability to understand that there is a painful (physical or mental) punishment for doing wrong, the children should be beaten. Well not beaten... but punished with a switch or spank or something. But once they comprehend the act of wrong doing with bad, then there is no need to physically punish, at all.
As for the games and rage -- One time I was playing CoH and I got so pissed at the happenings that I ran outside and punched the old man next-door neighbor square in the trachea! -- Fu©k that! Stupid game always cheezing and taking my sh!t... -- ::sarcasm face::