Sometimes a run isn't a run though.
I am not that good, but while I'll fight to the death I also like to have a sporting chance. On three occasions that I can think of I have had situations where a higher, more agile, but slower, fighter engaged me while I was in the Mossie. In all cases, a C.205 and Spitfire Mk IX in the first and a Ki-84 and an F6F on the other two, I tangled briefly before losing any chance to get guns on the other guy(s) so I put the nose down and did what probably looked to the other guy like I was running, but all I was doing was trying to reset the fight to the point where I might be able to get guns on them. In both cases I turned to fight again once I had enough separation or was able to get terrain cover to obscure my turn. I did not run to friendlies or ack, nor did I wait for the other guy(s) to give up and turn away. I got the C.205, losing my #2 engine in the fight with the Spit IX withdrawing and I lost to both the Ki-84 and F6F.
My point is that sometimes the other guy may be honorably "running".
I will grant that is probably the minority.