Lusche nailed it, when your flying close to someone, your Front end (Aces High) is constantly sending packets to anyone else in the area. The closer you are, the more packets.
Yes those packets go from you to HTC, but then they have to go to the other player.
And the have to come from the other player back to you before you will see the results.
Now I can't prove this, but I "suspect" that at times packets may not always go from player A to HTC to player B.
I "suspect" that sometimes they try to shortcut and go direct. (I could be way off base here)
But it seems that some of the strange issues associated with network lag would be explained if that was the case.
Where player A has 80 ms ping to HTC.
Where player B has 100ms ping.
But the ping from A to B direct is 400ms and dropping packets.
This is my own theory, and it is probably wrong, but its as easy a way to justify why strange stuff happens as anything else.
Fact remains, only you can cause or prevent a collision.
There is no "ram" no one has ever submitted film where they were able to get the other guy to fly into them, causing a collision, without taking damage.
So if you collided, its YOUR fault. As the only person who could have prevented it is you.