Ok Many things.n1. Change all ore into stonen2. change the ore droppings into cobble!n3. change the hunger bar. Always full never poisonedn4. In the new "Enderdragon Boss Bar" Change it to a little bit , always thing it has low healthn5. Change health bar always full health n6. customize the armor to look like chain. (All armor)n7. Change the splashes to nothingn8. Change the Mojang logo to say " Error. Illegal copy of Minecraft."n9. Change all there world names and send them a long way away from there house / or delete all there worlds and rename all the worlds the ones u deleted. n10. Make sure to change the name off all the stuffn11. Make mobs invisible( CAN BE DONE!)n12. Go on to all the servers they have and get them banned/ kicked/ demoted/ or grief there house.nHope you have fun screwing up your friends minecraft ! ~Skylord_Bryn