Threatening the AI's
In posts here we read about a tactic of surrounding an AI's planets with powerful fleets and demanding payment in the form of techs, ships and even planets under threat of attack...taking the AI for everything they've got...then killing them on the next turn. My question is how do you convey the threat? DA does not have free dialog with AI. All you can do, as far I know, is offer a trade. If it's a one-sided trade then it's a demand for a gift. I've only tried something like this a few times and the AI has simply refused the deal every time. Even when I've researched diplomacy through Total Majesty and gotten a Spin Control Center, the AI refuses any such demand. Am I missing something?
Thanks for your replies.