Hello,
Awhile back I was in a FFA game and found a hero of a treaty mate exposed in the open and it seemed it would most likely be in my best interest to snipe it (we had no common enemy and would likely trade blows in a couple of turns).
This situation made me think about manners towards treaty partners. I can see the position that you're not allied and other then what the game mechanics demands you got no obligations to each other. However I also know a lot of people prefer not to take hostile actions against threaty partners.
After some deliberation I think I fall into the second category, I did not kill the hero. I settled on the position that I won't attack treaty mates unless they act in manners that can be interperated as hostile (scouting my territory I consider hostile and I kill scout units that lurk around my cities). How do the rest of you handle interaction with treaty partners in FFA?