This probably isn't that true, as much as the news is pushing this hysteria.

They're domesticated animals. Weasels learn to hunt by watching their parents. These animals have never seen anything but a cage. They might cause some damage, but I don't think it's going to be that much. Fur mink are not wild animals and are not going to be effective hunters. Especially since we're going straight into winter, and they won't have time to learn.

Most of them will be dead in a couple weeks :-/