Edit: Okay, some context. First, I said : Or keeping the whole truth from the adults because um...actually, I never could quite figure out why Harry never told Dumbldore "OMG VOLDEMORT BLING BLING"
Said by iamspecial: It's because he wasn't up on the popular internet phrases of the day. Harry was still going around talking about "all your Voldemort are belong to us." It was 3 years out of date and made him sound really uncool, but he found it so amusing that none of his friends could bring themselves to tell him.