Agreed. I was kind of disappointed in the "AI" in Civ V. The first time I played and an country denounced me I obliterated them off the map and thought to myself, no one else will be foolish enough to denounce me now. Wrong, if you take over nation completely then everyone starts to denounce you, that is the way the "AI" is programed to think.
I dunno, makes sense to me. Annexing one nation will make all the others fear and hate you even more, of course they'll denounce you. A big part of the game is figuring out how to walk the line between expansion and alienating the other civs.
They can fear and hate me, as long as they are too scared to do anything about it.
Right, you are now an expansionist violator of the social order, and they're all going to gang up on you to stop you from doing it again.