Ohhhhhh. Then use Sandbox. You can move their spawn point to way up in the sky or under ground so they cant shoot you.
Hmm, I'm having issues doing this. I changed their spawns to underground, I changed them to way in the sky, I've used Sandbox to edit their values, I've used "Forge" (the user-map editor, not the in-game forge), I've changed their chunk type to edited, and also left it at original. No matter what I've done they don't move an inch.
Do you see anything I could have overlooked?
EDIT: Nevermind, Something was wrong with the Forge app that wasn't saving the defenders as Edited chunks.