So Last night i'm in a private game with my clan when a player shows up and starts shooting at us. He was on our game chat and said he got new software that allowed him to hack my microsoft account and my internet account. He could tell me my home address, ip address, packets being sent, bandwidth use, phone number and all my personal information. He could also see all my friends list and started telling me their information too. Then when I told him off he said he could ban me for life and shut down my console.
Today he followed me from game to game shooting at me. I finally had to turn off console for a few hours. He must have found someone else to stalk because I haven't seen him for a while. I managed to get his gamer tag off that chat window since it wasn't on in the game.
Tried to report him but since his gamertag doesn't show up in game and he's not a friend there is really no way to report him or get him off my back.