There actually was some player rp agreement way back in the day between the Hogs under Pipboy and the Xenos under Del that basicly split up Kepler with both sides being able to go into the others terriroty to chase Junkers, but only to chase junkers. The Xeners stayed in Southern section of Kepler and the Hogs staying in the North. The really annoying thing about this is that it sets up a situation where the Xenos are allowed to raid into someone elses house, but the people in that house can't respond in the same way.
BTW, how do you get to better relations between the Hogs and Xenos or FA and Xenos if you are sending the Xenos in to raid and fight? I assume that you can still go out of your ZOI as long as you don't start a fight, so what was the problem with the old situation with this?