Ghast Trees

It's great that the Nether Update is making the Nether inhabitable, but there still remains one problem: ghasts. If you want to build something in the Nether, it could get blown up by a ghast. You may just hear their screeching, and the next thing you know a fire ball rips a hole in your build. That's probably going to push a lot of people away from living in the Nether. So I propose we add something into the Nether Update: ghast trees. By crafting 5 ghast tears in a cross pattern in the crafting table, you would get a ghast sapling. When you plant the sapling in front of you build, it will start warding ghasts away, but only faintly. The tree will keep growing, and the taller you let the tree grow, the farther away it will repel ghasts. Also, if a ghast shoots a fire ball at you from far away, the tree would make it dissipate before it reached the build. The tree would be white, as well as the leaves. If you at all cut the tree, the tree will stop growing. I think this is a good way to keep ghast away.