The real Moons Eye Plan
Obito wasn't stupid. Kakashi-teme might argue that point, but he was an Uchiha. Just because he didn't have his Sharingan yet didn't mean he wasn't trained in other things. Even if nin- and taijutsu had to wait for at least the first tomoe to show. That's why he way so good at pranks. The building blocks of those could be set up beforehand, and the Sharingan would just make them better. Taijutsu, well the Uchiha style was reactive, based on minor movements only detectable with their eyes. And most of them had activated it before learning mid-level jutsu, so they relied on it's perception even when teaching. And those who had activated it later didn't teach, since they didn't have as much practise, and teaching Uchiha children jutsu that tended to blow up when it went right..well...that extra half second was important.
Anyway, he wasn't an idiot.
"You are going to reflect an eye on a rock, and use it to capture everyone in an illusion," he deadpanned. How would that work. The Sharingan looked flat red with black tomoes, but it was more complicated than that. "Even if it was successfully transferred onto that big of a surface to scale, who knows if it would have an effect with all those gaps."
"Because of the distance involved, it evens out to be the same distance between parts as a regular eye. Curiously, the moon is exactly to scale with a human eye."
"How are you even going to 'reflect' it up there?"
"A special partly solid illusion/summoning technique with the biju's chakra."
"Uh-huh," said Obito. That didn't exactly sound solid, but it might work. "What about the illusion? People can't stay in an illusion forever, they'll die if they don't eat and stuff. And what if they don't see a fire or something and walk right in?"
"The illusion won't effect how a person sees his surroundings, only how he perceives them."
Obito wasn't stupid, but he wasn't a genius either. "Isn't that the same thing?" The man sighed.
"It's like those spy techniques, the ones where the person doesn't even know that they are a spy. it blocks off that part of the brain. My genjutsu will block off the parts that reflexively lead to violence, and scramble the person's thoughts when they consciously try to think of it."
"..."
"They won't automatically attack anyone, and they'll get confused if they try to on purpose. Eventually they'll forget that that was ever an option."
"Oh!"
"Yes, so will you join me?"
"But what about tigers?"
...The man hesitated. He didn't see where tigers came into it, and was almost afraid to ask. Ninja children came up with the strangest things.
"You know, if they attack people. You can't turn off hunting in them or they'll all die, but if people can't defend themselves from wild animals what will happen?"
He hadn't thought about that. He was silent for a moment. "I suppose the world needs a new terror to compensate for the loss of the Bijuu. There must be balance after all." There, that sounded wise.
"What about us? If we can't hunt either what will we eat?"
"A specially monitored vegetarian diet can compensate for the nutrients in meat."
"But I'll miss steak!" wailed Obito.
"Which is more important, world peace, or steak?" The man held out a swirled mask.
Obito frowned.
He took the mask.