Great satisfaction with my parenting abilities came one day when one of our sons, many years ago, came home from a friend's house because he refused to play with the other boy's toy guns in a game of cops and robbers. Since then, after many sessions at the shooting range, they've all developed a very healthy respect for firearms along with proper safe handling techniques. They know what a firearm can do, and how it is a tool to protect human life. More importantly, they will vote for pro-gun political candidates. I know I can leave an loaded firearm unattended and unsecured in my home, though I would never do so, secure in the knowledge that our children would never touch it.
Paintball guns teach the antithesis of good gun manners.
There is time enough to teach our young men to be warriors on the battlefield to defend American freedoms. That training needn't be initiated with shooting paintballs at other people.