There is no "kidding" when dealing with the devil. Fighting evil with evil seems to be the historic and only effective way to respond to mans (demonic) inhumanities to man. 

Trust me when I state that I am not proud of the immediate reactions, regarding retribution, that come to mind when hearing of those who allow themselves to be led by the dark one.

I thank the good Lord every day that I am not in a position of authoritative justice, as there would be an astronomical increase in executions being carrier out on a daily basis.