User blog comment:Furbearingbrick/No More Spinoffs: Desperate Struggle/@comment-5956725-20130106004140/@comment-5956725-20130106014410

Some kind of shady mod or server (not something like "I WANTED A MOD SO BAD I WENT TO THIS SITE CALLED GETVIRUSFORFREE DOT COM AND I DOWNLOADED THE FIRST THING I SAW AND THEN THE COMPUTER RESTARTED AND THE PAGE WAS GONE", but something more legit, just ignored by other users for any reason), created by someone who wanted to "broadcast" a message to the world to a few lucky ones using Minecraft.

Almost everything mod related has "juice" on it, because it really adds a new aspect to the game that wasn't present in the vanilla game, and it doesn't come from nowhere or from some update they only got. It's something that can happen to you if you don't take care of what you download or where do you connect.