First of all, you need to take his online name off of the public post. What you did is against bungies rules. Just giving you a heads up. Second, while you are in game have the settings so only friends can join a live party. And make sure that you have a full fire team. Remember one thing about bullies they do it to make themselves feel better, look cool, etc. If you truly don't want him around make every effort to be nice to him. It will defiantly catch him off guard. Bullies act like bullies because they see it bothers you. Once you stand up to them, they tend to back off. We never had these types of bullies when I was growing up. I cannot say what to do, other than to report this through game there is a tab for reporting. If you need someone else in a fireteam, once I get the connection issues settled with Bungie, I'll join you. If I'm online and you need some help I'll join in. Hopefully an adult can help stop the bullying. Keep yor chin up and don't feed into his garbage. Remember, they bully for 2 reasons, 1 because you react to it which feeds into it and 2 because they want to feel better about themselves. Hang in there, I hope that some other people will be able to give you some more advise.