I can understand your frustration. But........As a flaming arrow myself more than a few times, I have been able to knock down several who no longer thought of me as a threat. (most=2 in a sortie) I have very little to lose if I'm going to go down anyway.
I think the most satisfying (while on fire) is getting the guy who torched you.
However I agree that having five or six guys shooting at wreckage as it spirals to the ground is simply ignorant and or greedy.
Just my Buck 'O Five.
I killed a Pony guy once right after he'd de-engined my Dora. I stirred a bit (half-piped) and he overshot. It was, admittedly, a lucky shot - and he was good in his 51B. He was one of two. I'd called for help and fought as hard as I could but, alas, was overmatched. Once I got the lucky kill (just after a bud had shown up), the other Pony fled. I bailed.
Then I got on the BBS and talked about how I owned his punk a**.
After that, I posted up some pics of my schlong on a photo hosting site, watched Shemale Reformatory* in HD, then logged back on to AHII and practiced HO'ing and colliding with the emmaknee (and an occasional friendly) just to work on my ACM skills. I'm getting really good. Usually, my prop is in the guy's canopy before he's exhausted half his belt. Pretty soon, I'll be able to visit Gunther Rall and talk HOTactics and HOHistory.
*file under Ellis, B.E.