Airfields are quite a bit away from the area of the map, so they do not disrupt dogfights that go on around the map.
Heli pads are (by nature) closer to the map.
The only way to solve this without harrassing aircraft is by moving the helis away from the surroundings of the map (which is generally not a good thing for helis, and is what the far heli pad is for), or not add the AAA on the heli pads again.
Maybe, but again, same issues (albeit less extreme than Airfield AA).
And would generally not be that effective, if you’re trying to protect helicopters from jets.
The way SRB and Custom Battles protect aircraft / helicopters on their airfield / helipad is that if you J out (without any damage), you are immune to any form of damage until you spawn back in.
I’d say this technically helps helicopters from aircraft, and eleminates the issue of aircraft getting harrassed by AI SPAA despite just being near the area, but is extremely scummy if exploited.