Okay I don't work for bungie but I read this and thought I should just throw a shot in the dark. Some recording and streaming software try to record the application (sometimes through memory to get a clearer picture) instead of just the a window that the user sets (I know this because I used one a while ago and whenever I closed the game it ended the recording). My guess is the game is detecting that and because it's interacting with something from the game, it flags the user