Extract from AI Attitude Bamspeedy
+1 If they ask you to leave their territory, +4 if you are given the orders to leave or declare war. These are only temporary, and as long as you leave when forced to, you get the points back the next turn. You can continually send 1 troop in, spend 1 turn there and claim you will leave, leave when you are forced to, but go back into their territory the next turn, and the AI attitude will not drop in the long run, just keep cycling between +/- 5 pts. Or sending a large stack in every single turn just to get booted out every turn does nothing in the long run.