H5117 called it a very weak HO, so evidently there's still players out there who see these as inarguable HO. "Evil, evil HO" is mostly tongue in cheek.
The line between fair and unfair depends on who's involved, how the fight unfolded, and what the circumstances are outside of the fight. Ask anyone at any given time, and you'll get as many different answers. So it'll pretty much inevitably be hair splitting when you take all those people/answers and have em sort it all out.
Dogfighting/Airshow: To me the essence of the game is when the air combat's outcome is still up in the air. It's true that it's not completely natural to extend the fight despite kill opportunities, but then IMO that's a minor price for a longer dose of that essence. I'm not just sand bagging in that fight. He had relatively plenty of room to turn the tables and win it until the very end. What matters most is that both actors are in a position where the one that tries hardest and deals with his means the most efficiently or cleverly. If that means taking a handicap, then IMO that's not fake or artificial. Those moments when everything is hanging in balance are what the game is all about, for me.
All the better if there's room enough for me to play toreador and type "bang bang" while dodging an opponent in a better plane, and still come out on top.
This sound clip is just about exactly how I see it.