-Herobrine (unless you could choose to put him in the game or not)
-Multiplayer being the only mode
-if ramdom people could come on to your minecraft server
-if the developers just got rid of minecraft (then there wouldn't even be a ruined minecraft)
i dunno. maybe a couple of biome busters and a dozen or so nukes? that should just about RIP your world apart and punch through bedrock.
seriously, buildcraft, redpower, industrycraft, steve's carts, balkons weaponmod, gunz, etc.