If you're already at a disadvantage due to numbers, energy or altitude, it's suicide to just turn and fight, and frankly as I stated in another thread there are many who look at the MA as much strategically as just pure fighting.
You never know what will unfold in a fight. I've been in a number of hopeless situations where the tide has turned in my favor. It's a feeling you can't obtain without that experience! It may unfold this way 1 in 50 times but for me it's an addiction which yields a greater high than just trying to save chicken skin.
I suppose one could determine a socially acceptable matrix for why someone might run to ack. Out numbered, poor E state, Winchester, low fuel, damaged flight controls, ect.. It can be discussed all day long but it's simply just part of the game.
The mental image I had in mind was a fight were E states are similar and someone runs to ack or where your outnumbered and the red guy runs to ack after getting beat in the merge. To this I say boo and kindly suggest the red plane turn and fight.