Pardon if this has been discussed previously (a search found nothing).
We should have a way to destroy an ant dungeon without going in and fighting all the ants. For example, build several fires around the dungeon, when they've burnt out the ants are gone; or dump barrels of water on the dungeon, a certain amount of water in a certain amount of time and the ants are gone. You would get no rewards from this other than the dungeon is gone.
This occurred to me recently when I logged in to find an ant dungeon sitting at the edge of my claim (about half on and half off); if I finish the claim and pali as planned I will have to live with this blasted dungeon wasting space just inside the pali.