I've always envisioned a near-apocalyptic, autonomous flying drone, resembling a large flying mosquito, about the size of a large pit-bull, that randomly target

I've always envisioned a near-apocalyptic, autonomous flying drone, resembling a large flying mosquito, about the size of a large pit-bull, that randomly targets parked cars, and siphons several gallons of gas from their tanks, in order for it to 'survive'.