Is Young Earth Creationism disproven?

Even on an issue like this, absolute proof doesn't exist. For example, it's possible that God created the world in seven days, just like the Bible says it he did. However, he also put a bunch of fossils in the ground to make it look like evolution, knowing that scientists would come along and make fools of themselves by developing the Darwinian theory. The evidence is at least consistent with this possibility (though a God who did that would be hard to love).