We do. Our guns are locked in a safe in our basement but they and extra bullets are there nonetheless. We also keep Dh's sword collection down there.
When Dd is older Dh will teach her how to safely use a gun and take her to a shooting range. He'll also teach how to properly/safely handle a sword and fencing swords.
I don't think that a household should be without weapons because there kids are around. As long as weapons are safely put and locked away and children are educated about them then it shouldnt be a problem.
What do you think? Do you keep guns in your house? Will you be teaching your kids how to use them?