Violence: Squirt Guns

My Boys Always Pretending to Shoot Guns.

How concerned should I be about my 2 toddlers always pretending to be shooting guns during play time. They are otherwise not violent or say unspeakable things. They are mostly shooting "bad guys" and know that they are not to "pretend shoot" anyone. I know they are boys and to some degree, this is normal. After all, they are only mimicking what they see & hear. Oh, I guess I should mention that my hubby plays Halo, a computer game that is, what most of us would consider, violent. We talk about what is real and what is make pretend,...