ORIGINAL: XLVIII Pz. Korp
Pull them back and hide them. In PBEM circles removing them can be considered "gamey" tactics in that by removing them from the map you are denying your opponent the chance for points if they are killed.
That depends on the player of course. Some of the guys definitively consider this - or removing any unit from the map - gamey, while others don't mind what you do as long as you play fairly within the capabilities of the game engine.
In all fairness things such as this should be agreed before the game starts, so if there's been no discussion before hands it should be OK. I'd ask the opponent though even in the middle of the game just to be on the safe side.
Some players think that leaving trucks on the map is a gamey tactic.
I personally would never use a truck to cause a "surround" in an assault. Nor would I use trucks to block roads, bridges, or exit hexes (especially with extreme assault turned on).
I've never seen a tactics treatise that says, "move your transports to "x" so that the enemy cannot retreat or drive over a bridge".
I do not find fun in a person who uses trucks in "gamey" ways. My personal ROE has "non combat" (a non combat unit is any that cannot assault or shoot) units given the ability to exit the map. When I do it I drive them to the map edge, out of sight of the enemy, and then remove them on the next turn.
If you were the truck driver isn't that what you would do?
And, I find it both tedious and comical to drive them around to hiding places. Unless they would be needed later in the scenario.
“The object of life is not to be on the side of the majority, but to escape finding oneself in the ranks of the insane.”
― Marcus Aurelius, Meditations