The way I see it, the line between IC and OOC was blurred so long ago by things such as IRC and EZI that it only exists anymore in the context of these boards and posting rules. I would rather fight with people I know, and like, (even if I only know a small portion of the members) than with people I signed a treaty with.
It's a tough way to play, based off of treaties, because everyone has a different agenda. If you don't base your play off of friendship, regardless of how it came about, then I can't imagine a treaty lasting. I think we've seen politically motivated treaties cancelled hundreds of times over at this point.