What you're suggesting is a mechanic to encourage bad RP. The idea of battle isn't "we're too powerful we need to go easy on other people" it's "If you aren't so dedicated to mages you forget your past grudges, we don't want you" although tempered somewhat. But the idea is that if you'd rather kill your past grudge non-mage than go out and hunt a mage, you're not villager material. There might be some exceptions like if there really are no mages, you have the key and your grudge is wandering down eastern.

If you ever voluntarily drop the mantle of battle to go kill people, then that means you don't have the heart of a villager.