Should I kill them or let them be?

I have a slab of concrete that is supposed to be a porch in my backyard, these chipmunks, one named Chip, the other named Wilbur, are living under the slab of concrete, I see them everyday and they are starting to annoy me because they are digging shit up all around the slab. I don’t know if I should just put a rat traps out there and kill them, I’m not a killer and I like to preserve nature, but I fear that when my garden starts to grow they will eat all my stuff. So what should I do?