Are you serious? If you are let's go all out and make it truely authentic to medevil times. Let's put diseased dead bodies in our catapults and hurl them at our enemies.
For Global and Atomic, let us use suicide bombers, roadside bombs and such in war.
I draw the line at such morbid suggestions. If you wish to hurl animals for fun or other such wacky ideas, choose a different game.
BTW I do enjoy games like GTA and Hitman but come on now. Your idea is just way too messed up. Nexon has their plate full with critical issues.