What happens if the guy calls RTB, you let him go, and then comes back and kills your side's goon?
..
There's no chivalry in war. Or at least, even with a limited-simulated version of it.
Shooting chutes may be distasteful to some, but to the rest of us, we choose not to do it for the waste of ammo, rather than for any reason regarding sanctity towards this 'honor' thing.
This 'honor' thing shall persist only if it suits me. I will show 'honor' when I feel like it, and I expect that certainly will be the case of others, too.
I'd certainly not expect it to be mandatory. I'm not THAT naive. If I expect honor I'd be going and playing in one of those H2H rooms where people fly with wingtip smokes to signal landing, giving check-6 engagement calls. *Blech*