Kids today hey! - kids are no different than they have always been IMO - there have always been parents without morals, social misfits etc - thats never gonna change - just prey your not on the receiving end tis all.
The environment they grow up in is a determining factor - every one is born with a clean slate - Most Films and computer games are unrealistic fantasy in every way - so if kids are not exposed to reality then they may be deluded by it - could by why that when I was in my teens I seemed to think I knew everything but actually knew sweet FA - didnt go on a rampage though - was probably subdued by too much TV - and my role in society - which was buying things I didnt need
GTA has no morals - thats plain to see - who knows if games really influence people - I used to think lyrics in pop songs meant something - (as oposed to them being written down in 3 mins by a drunk tw@) so maybe - and if they really were influenced by GTA etc then society has to put up with it.