This might be true, but I do see a pattern there : Both games and shooting are about executing power. Power, this is the thing that disturbs me.
Persons who feel especially powerless - no mtter, why - can use both games and RL guns as a tool to enlive the feeling of having power again, to recreate an artificial momentum of having power that they lack in RL - to "get their stolen power back", to put it quite extremely.
People might even not realize that guns in games are different than RL uns.
I have found something different via RPGWatch today : "The Rise Of Cost And The Fall Of Gaming" :
http://www.notenoughshaders.com/2012/07/02/the-rise-of-costs-the-fall-of-gaming/Including a great quote :
�Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius � and a lot of courage � to move in the opposite direction.� (E.F.Schumacher, Economist)