Assuming this is just another mistake (likely), it seems like since Russian arms sometimes end up hitting NATO soil, that the reasonable course of self-defense is to extend their air defenses and shoot down arms that come near their territory. You can’t know that the drone will go off target until it does, so you just have to shoot down anything heading in the general direction, even if it’s likely targeting Ukraine.
At least during this period of anger we won’t have to also deal with the gnawing realization that they’re 100% going to lose. Harris may still lose, and this could certainly help her along the way, but it’s not a certainty, which is kind of better?