You don't have to declare war - just buy an inquisitor or two. Use units to ferry the settler away so you don't have to rely on a DOW. To combat missionary/GP spam you need an inquisitor, and/or units to ferry them away(missionaries will die soon after due to attrition).ДЄnother tip I've found is if you receive an early DOF request you can take it that civ intends to forward settle you regardless if you say yes or not. If not it's time to work on your diplomacy with other civs before you DOW. In regards to the warmonger hate you've accumulated i find it best to denounce first and see if any other civs feel the same way. If the AI is hostile to you early on it was probably because you denounced them and thus will not care about your opinion on any matter. In this case the AI is not at fault diplomatically as it was honest. You have to realize that land is fair game, and so is converting when you haven't founded a religion yet. In response to the AI spamming you, whether it be cities or missionaries. It would be nice to do this like in Call to Power. So for example you officially say 'If we find your missionaries spreading lies again, it's war', and so they act according to this, they either take your word on it or not, so when they proceed anyway, they face the consequences (no warmonger penalty for DoW itself, until conquering cities) as well as you, as you are faced with 2 options upon the deed, either follow with your ultimatum or bend over if you were bluffing and face bad reputation in the world as someone who doesn't stand behind his words > Others won't take your threats seriously and might act accordingly towards you, that being send spies/missionaries/bully CS, but if you act according to your threats, you get rep of someone who 'talks the talk AND walks the walk' so to speak, so you get a mild positive modifier and it might prevent others from doing something that stupid to you. So it's not just 'random' (in their eyes) denouncement/war after the deed which AI nor the rest of the world actually understand, as in they don't tie together what is happening and why = action > reaction. Yes it would be good to be able to give them ultimatums that they would actually follow, as well as ask friends for help (donations etc.), and demands that would actually work.ДЇor example threatening them with denouncement if they continue sending missionaries/spies/bully CS, or war as the next step, if they continue after denouncement.ДЄctually I was thinking about a nice system for that: You get diplo penalty for going to war with them but they effectively forced you into itДЄnother point is i was only allowed to ask him to stop sending missionaries at me once in the whole of history. Its the same when you ask the AI not to settle near you and they think its acceptable to build a city within 4 squares of your capital. Maybe not following through with the ultimatum has some negative penalties. I was thinking the ultimatum could lessen your diplo hit with other AIs for going to war over something you've asked an AI to stop doing, although the trade off is it increases your penalty with the civ its aimed at. I didnt take any of his cities in retribution (even though he offered one in peace negotiations) but the 2 DOWs destroyed my reputation and everyone else hated me.

It got to the point where i had to DOW him and take out his missionaries and great prophet he was sending at me. At this point i would have liked to have told him either 'ok, we accept that' or 'if you keep doing it we will go to war'. The AI next to me was spamming missionaries and sending them to convert my cities (4 missionaries at a time!!). I was thinking this when i was playing the other day.

Civ 5 gatling gun