Right now you have absolute control over whether or not you collide with someone.
That statement is just wrong in my view. (This may take a lot of imagination to visualise.) For instance with the current system, when stall fighing an enemy and both pilots get into the flat scissors. Pilot A who is defending from pilot B. Pilot A brings the fight closer and closer to the stall to force an over shoot and get his reversal. In the turn at the end of the scissor, Pilot A turns right on his stall horn. On his FE he is clear and skims past the nose of his attacker left to right. Pilot B, trying to avoid overshooting straightens up a little throttles off a little goes to his on his stallhorn, as this happens, Pilot A side swipes him on his FE. Pilot B falls out of the sky or explodes instantly. Pilot A flys off without a scrach. It's no fault of either pilot, both were fighting each other honourably. It's the mixture of the internet and the collision system.
I don't think DES's "both should die idea" would ever work at all. I still am a believer that the current system is ok, just with a little modification:
Only if both Front Ends see a collision, then a collison is recorded both take damage. I see the problems with it are equal to what we have now, but, both pilots will not be able to complain.
Plus more decent fights will not end in one player being towered prematurely.