We (DH and I ) have always looked at these critters as just aerating the soil. We've not seen that they do any harm, per se...They kind of just come and go in our area, and really haven't found them to do much harm. Leave well enough alone? Unless they're causing true damage? Let 'em be. They very well could be feasting on grub worms, as is usually the case in our neck of the woods.
