Similar comment to a couple above. A reputation meter. Because when the purple monster comes in mad about the fisherman, if you give him a sacrifice, he's cool but if you don't, he eats 5 people. I feel like if you gave him a sacrifice, your reputation with the people should go down. Ditto with letting Chester give you gold for eating people. Putting a price on your peoples' lives is pretty skeezy but there's no game mechanic that punishes that behavior at the moment.
Oh! And I got to cure Chester's curse, but then he came in later saying he'd eaten people and I'm like, Dude, come on. We talked about this.
All in all, great game, obviously a lot of people are really enjoying it. :D Good luck to you!