So I've noticed that if I ever send a missionary to convert another civ's cities, or if one of my archaeologists digs up an artifact in another civ's territory, next turn that civ's leader shows up complaining to STOP DOING THAT TO US! You can either say, "Sorry. Won't happen again" or "Buzz off!" Conversely, if another AI civ does the exact same thing to _me_, I can't find a Demand or Discuss option to respond in kind. Did I miss seeing where those options are? Or is the game design being deliberately unfair to humans?