Put yourself in the place of a hypothetical someone who could do that. It is not a simple calculation. Its purpose would be to minimize collateral damage, but

Put yourself in the place of a hypothetical someone who could do that. It is not a simple calculation. Its purpose would be to minimize collateral damage, but it would cause a lot of collateral damage. It will happen: it is already too late, and it will get much later, but it will happen.