What is the ruling on throwing a ball at a wall on which there is a plaque inscribed with the name of Allah the Almighty, knowing of its presence and without intending to mock?

The questioner should dismiss the whispers of mockery and not pay attention to them, because they are from Satan, and indulging in them leads to their entrenchment. What happened from him is not considered mockery as long as he did not intend to throw the board or to mock.