I just had the following mission idea. It uses the BAS Tonal addon.
Military situation is as follows: Tatu is divided into green, yellow, and red sectors. Green is controlled by government forces, yellow is uncontrolled sector and red sectors are known locations of hostile militia activity. US forces have set up their base on the central airport.
The player is a US agent who operates from the central airport. His mission is to drive to a yellow sector of Tatu in a normal car at night and put up propaganda posters against the militia's warlord. This is done by camcreating one of the poster objects through an action. There has to be a certain distance between these posters, or probably they have to be at pre-planned locations.
Of course the militia in the yellow sectors would react hostile to the car, but due to setcaptive it does not because a car is not something so unusual that they would just start shooting at it on sight. But the player has to be careful, especially concerning arms: He is not to carry any gun in his hands, otherwise the setcaptive will be set to false and he finds himself surrounded by hundreds of wild militia guys in Tatu. But for emergency situations- which by scripting will occur to make the mission tense- there is a silenced Uzi in the car.
There could be a lot of things happening. For example the player is driving down a road and all of a sudden there is shooting between government-friendly militia and the warlord's militia. Probably the player is tempted to draw his Uzi then although nobody is actually shooting at him.
A big idea would be that of multiple-choice dialogues, done with dialogs (;D). For example the player runs into a militia strongpoint and has to stop his car. Now he has to give satisfying answers to the strongpoint leader in order to avoid being forced to get out of his car or even being shot. We could even simulate a part of real intel operators here by writing pseudo-psychological analyses in the briefing. Only based on that the player can determine what the right answers are.
Well, I'm sure this idea could be developed further, although I think that the actual creation of such a mission would be quite an amount of work.