they're passive like normal boar, you should be able to go around if you don't attack them.
They're rediculous, because you can't deal with them from the outside of the building. They're triggered to only spawn when you move through the dungeon, and there's usually 2-4 of the damn things.
They ARE worth fighting if you're prepared to deal with them, though. Aside from a lot of xp, they're big and edible.