The answer to this depends on the kids. It is fun to play with toy guns. I did it, but I was immitating my TV heros on shows like "Combat" and "Rat Patrol", 007, Simon Templar, and the Roy Rogers and such. We aslo said prayers and the pledge of aliegence in school.
If we missed church on Sundays, we better have a real good reason.
Kids role models are often quite different now, like.. I don't know...Snoop Dog, and Fity Cent, the character on Grand Theft Auto San Andreas, and Hit Man, and things. Violence for fun, profit and the pure sake of violence. It's something to consider. Who do your kids idolize?
More often than not, it seems, the Gov't has become many kids "father" because the real one has walked out, or he's with his other family or something. What role models will they emulate?
I was interested in them because my favorite hero, my Dad, was an Army man. We were depicting the struggle of good and evil, back then. Are the dynamics the same now?
I say it depends on the kids. Their parents need to guide them in "healthy" play.
You also need to ask yourself if you want your kids going from "Mama", "Da da," to "Bang, You're dead!"
My answer isn't up there, but it's a "Maybe."