The exact moment I knew I was a gamer parent -- that is, a gamer who happens to have kids, and not just the parent of kids who play games -- was when I heard my nine year-old son Drew proclaim, "They won't let you kill kids in this game? That's a bunch of bullcrap," and immediately realized I was going to have to have a conversation with him about it.
He was playing Fable II. One of my games.
http://www.cracked.com/article_18819_the-4-most-important-things-to-know-as-gamer-parent.html