Crusader Kings II - Mod General

[Alexander the Pretty Good]

So I woke up this morning with a vague idea of adding kidnapping to CK2. I'm not sure yet whether it would be more fun as a plot or as an action you can take from the diplomacy screen (or both, ala assassinations). It would sort of be like the imprison mechanic but it would be based on intrigue and you could (theoretically) target people outside your court and vassals.

My questions are - is something like that possible, and would the AI know how to do it?