Creepers in the White House, it’s a known problem in the dark corners of the building. Half of what the secret service does in the morning is clear the building of creepers that spawned over night when no one was around to block hostile mob spawns.

Because it’s illegal to say “I want to kill the president of the United States of America.”

A lot of dumb people thought they could talk about killing politicians on the Internet if they ended their message with “in Minecraft” so they could claim they were just taking about a game. At least one of them has already been arrested proving their plan doesn’t actually provide any defense.

So a Minecraft cause would be someone plotting (and then presumably actually) killing them.

When you’re talking about actionable threats, I.E. real world violence, but want to appear only hypothetical, the meme is, “I’d kill X in Minecraft.”.

Death by Ender Dragon.