The reality is that if you don't have decent concealment pick a new spot.
On your earlier example of having the ZI whip out binocs and see you, well if you're either close enough to see them doing that or you have yuor binocs out then you're either too close, or they can see you whip your binocs out too.
Snipers are extremely careful about how they move, what they carry, and how they set up their shooting spot. They don't just run into a field and reply on their Ghillie suit to do everything for them. It's one small part of the much larger technique of camo.