Garm is a dog and as such doesn't get to weigh into this decision. No, I'm not sure, it's not like a science book- it's magic. It, however, is my house and no rageful disembodied asshole gets to strike at me with impunity.
You are at that.
It will be. Have you ever known anything to deter Loki once he sets his mind to it? Think I should bring him a small gift?