YIKES!!!!! Nasty critter..
What will happen is the government will find something that eats these hornets (other than Preying Mantis) bring it over here and that critter will get out of hand as nothing will eat it...
Happened in a city I was in with these little bugs that ate certain wheat, they brought a spider over that ate these little bugs and now there are spiders and their webs all over the place...if you leave anything parked for any time at all, when you come back it has a web on it...
I had a spider living in my motorcycle mirror for a while...he got to see some country...