First of all this suggestion was inspired by the comment section of this page (http://lotrminecraftmod.wikia.com/wiki/Pacifism) sorry if it was already suggested.
I think if you get +50 alignment with every faction you should get two titles. And the Pacifist shield.
The titles would be: [Pacifist] and [Peace Keeper]
The pacifist shield would be oval shaped coloured in with black and a white dove in the middle.
Here are two examples of what the shield might look like:
That's all, Kudos and constructive criticism is welcome :)