Maybe we are becoming afraid of guns in the US though. Or maybe it is only guns in mass quantities but a pistol or two is okay. Seems like there are a lot less toy guns around these days too. When I was a little kid I would go around with my cap gun in a holster slug on my hip. I would go to the park like this, I'd play in the backyard like this, jump on the neighbor's trampoline like this, ride my bike around the neighborhood like this. It was made out of metal and looked decently real to the untrained eye. You can't find very real looking toy guns anymore for understandable reasons. Give us twenty years and the idea of a seven year old carrying around a toy of something so "evil" will be unheard of and the mere thought of it shocking.
But even then, I can't imagine that we will be cutting down on the quantity of movies with guns in them or the amount of guns appearing in movie. I think cartoons probably suffer more because so many parents are so sensitive of what their children watch. So when somebody says, "wow! Aladdin said that nice kids take off their clothes!" even though you have to stretch your imagination to come to that, parents freak out about it and Disney responeds by giving them what they want. You would think instead of going through the trouble to erase the preist's knnes, Disney would just say, "uh, those are his KNEES genius!" But I guess the customer is always right.