Okay, I guess I took all that a little too seriously again—sorry about that.

If I’m picturing the situation correctly, the meltwater is dripping from the panels (or from the frozen gutter) onto the ground below—in this case, the parking lot. Since the ground is frozen, drop by drop a layer of ice forms, gradually turning the entire parking lot into a skating rink… if cars start sliding or people fall flat on their faces when getting out, no one wants to be held liable, which is why the idea is unpopular in climates with long, cold winters.