[@Shoryu Magami]
I don't think the hub thing has been done before, at least not from what I've seen. SAO just has them holding their hand out or whatever for the hub I can't remember if Log Horizon even has a hub, but I wouldn't doubt it does. Yeah laws and shit. You can't just go around killing people in a guarded area and not expect punishment. Especially in the starter city that the twins arrive in. 

Holy sheit I just came up with an idea that may work. I'll tell you later, for now I'm going to take a shower.