Custom Game with a modder

I was just in a few modded games of Halo 2 with this 12-year-old (by the sound of it) with the gamertag of XX KILL3R XX. As you can plainly see, he has not been banned from Halo 2 Matchmaking. For some reason (possibly because of the flying tanks and rocket-shooting warthogs) only one game is showing up in Bungie's records. The game that shows up can be found below: Arranged Game on Containment(Permalink) Please note that while I won this game, he was the one that never had to reload. Take a look at how many shots he managed to fire in 15 minutes with no weapons on map and only a sniper rifle (Permalink) I don't think that I would like to meet him in matchmaking.