Ok, I get why hillbillies are the ones who would be abducted. They live in remote areas and are isolated. Even the medical stuff. We do weird shit to the animals we're familiar with, let alone new species.
But why can't they disguise their ships? We could make ours look like anything. Why don't they? That's the part I never could get. Capable of traversing interstellar distances, yet stealth is lost on them.