Actually, that would be a good way to take all those insecure devices off the internet, or at least prompt someone to do something about it (even if temporarily, like hitting the "factory reset" button) before reconnecting them.

Most countries don't allow cars on the road that are unsafe due to lack of maintenance. Perhaps it's time to do something similar for internet-enabled devices that cause serious harm to others. Hold the user, manufacturer, or network operator responsible for harm caused by their lack of maintenance.