Thousands of demonstrators came out today, with hammers, to do just that.
Al Masry al Youm reports that there were minor skirmishes between the protesters and police, but the military was not able to stop them from destroying parts of the wall.
Some demonstrators were injured; one fell from a bridge that the wall was built on top of and one tried to climb an adjacent building and fell as well.
(h/t Sylvia)
UPDATE: Here's video:
(h/t Dan)