It's a really tiny bonus BUT... if you manage to be at war with 20 factions that somehow border you, it's like having a free colosseum or something.. Free as long as you don't count the cost of being at war =S

Actually it's kind of crap because some barbarian factions get a public order hit, simply from being.. you know, unwashed, unshaved, uncivilised savages that live in trees.