Pillars - The counter to uninvited Ghasts!

Ghasts need an area of 5x5x5 to spawn. If you don't want to make all your rooms smaller than this you can do what I did and build pillars from the floor to the roof! It looks pretty nice and it keeps the Ghasts away.

Ofcourse you could also remove 4 blocks from the pillars and it'd work just as well, but then you'd have weird floating blocks. Set them on fire for nice lighting?

http://is.gd/gFS79