I've been waiting for someone to post on this thread what everyone else fails to see.
So here I go.
Revenge during Banish can be used as a small exploit as well, to the defender's advantage.
And I've been waiting for Herby to post this. It is the typical "Herby doesn't want everyone to know what he knows, but at the same time wants everyone to know that he knows, because he thinks he is so smart that he knows" post.