I was bored to I made another minecraft bot, but this time it is even more useless! It's a pet rock that will just follow the nearest mob including items, and do nothing else. Press "9" to open the menu, from which you can summon a rock, kill a rock, and teleport the rock to you. Just use MCEdit to paste the schematic into your world, press the lever, and you are set. Alternatively you can just download the world and mess around with it.