Souv - in short YES, they all do (well, 95% anyway, I accept that the occassional ones don't).
My sister banned my nephew from having toy guns and he used to cut all his sandwiches into gun shapes and shoot people with cheese sandwiches instead. The fact they were a banned object just made him more obsessed with having a gun, so in the end my sister relented and bought him one small one.
Likewise, I didn't buy one for DS and didn't allow him to watch horrible violent American cartoons, but he still developed that desire to shoot everyone. He has a large popper gun (which is currently in the back seat of our car and looks amazingly like a sub-machine gun. Am just waiting to be stopped by the police...) and a water pistol. He also makes guns out of any object he can.........
I think its a testosterone thang...