I have recently read that Deej stated if we were to ever get Private Matches for PvP, we as a collective community must continue to ask for it.
Private Matches will bring the competitive side of gaming to Destiny (MLG, GB, UMG, etc.). It also allows players to create their own custom matches to play with friends. I, like many other guardians, love Destiny and would rather play it than switch to another title such as Halo to satisfy my competitive necessities. PM's would open up a whole new world to PvP.
Let's rally behind this, and support by voting!