If a con who ditches by a friendly base alt + f4's out will you not get the kill?
I believe if you have a ping on them and they Alt+F4, you'll get credit. If they Alt+F4 within "proxy" range then you'll get credit for a proxy kill.
The other night, some player named zigtar was trying to BnZ me in a Bf 109K-4 and after I managed to equalize his energy and then gain the advantage and latch on his six, he starts to run way but his energy is not enough to gain any distance and I close in. As I get within 800 yards, he hits Alt+F4 and I got the proxy kill without having to fire a single shot.
ack-ack