I have to say, towing giant space-rocks around and getting them to follow a planned trajectory also sounds like a damn impressive weapon, if someone wants to us

I have to say, towing giant space-rocks around and getting them to follow a planned trajectory also sounds like a damn impressive weapon, if someone wants to use it that way. I'm not saying it's not worth doing; I'm just saying when humans see ___ can be done, enough of them get the idea of weaponizing ___ and we should keep that in mind. Perhaps we should simultaneously consider what defenses could be put in place ... this has the benefit of being useful planetary defense against "natural" earth-impacting rocks, too.