People barely check their b.net messages. Messaging him on Xbox LIVE would be a much better approach. He even spelled "too" wrong (first two letters, not the number).
So after I sent him a message, he replied that "his brother made his gamertag, and you dont have to do what it says" I told him that the point of a gamertag is to represent your personality as a gamer. I also pointed out that i followed my gamertag for every second of my life, seeing as it's my name. He hasn't written back.
Maybe he wasn't feeling all that 'Legit' that day. And sure his brother made the account, just like his uncle works for Microsoft, and his cousin works at Bungie. He's connected don't-ya know?