I have both a PS4 and Xbone but why is it that only the PS4 can lock a fireteam and the Xbox ONE can't? My fireteam and I were doing a Crota raid to get the flawless raider achievement and right when we were summoning Crota one of my less known friends just joins out of the blue and screws up all the work we have done. Wasn't hard to do again but it just frustrates me to no end that we can't lock a team to play by ourselves without showing offline so no one joins us. Bungie can we please get that added so we don't have random friends joining without asking?