But this command might benefit chicken farmers and stuff like that instead of forcing them to equip a shovel and other non-combat items to prevent accidentally killing their chickens
Of course it should be ON by default every login to prevent getting jumped unprepared by mobs in other areas.
+1 that, or make it so that /pvp keeps you not only hitting walls and your dog but from hitting wildlife too. of course, this will probably get someone eaten by a wolf 😀