Off topic: Coolzero, as cool as this would be, the game engine dosn't really support this. To do this would not be easy, it would take a lot of time and hacking, and some parts we don't really know enough about to be able to do. In short, chances of this happening are fairly low.
I can think of another reason to have Evac Trans in game... B&T games come to mind, but you can also role play with them too, particularly on World Maps. However, while no blight is present, you can use some one as player blue just drive over your base... Same effect. Everything dies.