Any way to reduce NPC attack vertibird chance?

[linyuheng2000]

I check creation kit and I know vertibird as a NPC, has 10 perception, that's very high so it's hard to sneak when enemy vertibird are around. But the problem is although vertibirds can found enemy easily, it's actually easier for NPC to detect vertibird first and start to attack. For me, it's just very annoying when I ride a vertibird and fly above the cloud and all commonwealth enemyââraider, supermutant, gunner start to shot me endlessly. They are out of my load distance and I can't find them at all but still I keep getting attack from everydirection. Is there any way I can fix this with mod? Stop NPC attack flying vertibird, only fightback when the vertibird attack, or give vertibird a little sneak effect to make it harder to detected by NPC. I have no idea how to do that but it really break immersion that almost every enemy try to shot down every vertibird they came across. For what? Try to get killed by the minigun? Or want to loot those broken metal scrap? If anyone can help me fix this, I will be appreciate.