I have noticed a severe increase of griefing players on the master chief collection. These players teamkill multiple times, kill their own characters, destroy and waste friendly vehicles, shoot to harass and pop shields of others etc. These players even harass you after the fact and acknowledge that they enjoy doing the griefing behavior. I have reported these players on xbox but looking around I cannot fiund a way to contact a real person on the matter, as I have a video clip and chat logs to prove how toxic these players were, I have NEVER seen anything like this on xbox live, and this is NOT what I pay my money for when playing on Xbox live.
Any person behaving in an unsportsman-like conduct can be reported over at the Support Website with any evidence you may have.