Create a new item which when built by dupes behave exactly like ladders, but when given a deconstruction order by the player, they instantly deconstruct (without a dupe errand). This would speed up strip mining operations and large builds in an open area that required a lot of laddering. Giving repeated orders to delete 2/4 ladders at a time for long horizontal/vertical paths is tedious.
Not even sure there's a hook in the game to give items these debug-like powers (instant deconstruct) but it would be nice.