Non-aggression relation mode

I don't know exactly how this could work, but one thing that I have noticed some times while playing is that I don't want to either attack or ally with a certain player, but just want to not to have to deal with the other player. I have also at times sent platers requests for a non-aggression pact, but it is just words, nothing more, so I think that there should be a relation in the game that does this. Maybe the relation would make it impossible to change relations from nonaggression from anything except to peace and then there is time period, say 24 hours, in which you would be stuck on peace before you can change relations with this player again