Megalodon, your saying we have to prove why a 75mm shell would shoot down an aircraft that intercepted the shells flight path. For all we know, some of the pilots listed as MIA were shot down because they intercepted an artillery shell's flight path. I don't know this happened and I'm not saying it did, but you must acknowledge that its a possibility.
We can't prove aircraft were shot down by tanks in WWII, and just as much to the point, YOU can't prove they weren't. It isn't gamey because it is physical possible, and may have happened for all the evidence you have shown.
Here is what you must do for this whine to have any legitimacy:
Find definitive proof that it didn't happen in WWII
Find definitive proof that it COULDN'T happen
Tell why/how it negatively affects gameplay and tell us what you propose be done about it
And the 163 can't come close to turning with a zeek. I bet that you turned left 130degrees with the 163 2k out and then stopped, thinking you were safe, while the 163 turned left a bit and made an oblique pass instead of one from dead 6. You, figuring there was no way he could have made that shot, now say that a 163 is as manuverable as a zero.