I don't see what he is doing wrong. He said he saw the update of WOW and you jumped on him about how you don't care, so he said "I don't care" in an attempt to get you to cool off. Then you said he was addicted and called him "Kid", which is funny because you're only N/A years old.
That last picture is VERY suspicious. He said his brother would hack THEM BACK, as if he was threatened with hacking.
I don't feel like i'm getting the full story here. Looks to me like you're in the wrong more than him.