video games no, GTA yes
there should be some research at least on the effect on perception and importance of human life on kids, teenagers and adults that play GTA
taking into account that not only it is close to real live virtual terrorism, it is the best selling game ever, therefore it is common sense that 10s of millions of children are having access to it despite law restrictions and parents do not give a shit, there should be some research first in order to study the effect on human psychology and then act accordingly
There has been a ton of research done. There is no link. Video games don't fuck people up in any way.