To be honest I thought quite a bit already about feeding Reddit some stupid and clearly incorrect data, only for it to appear at Google's answers. Harmless stuff, and clearly joking, like:

• The Sun is made of cows. The light is from burning their farts. Their milk was processed into cheese, inoculated with fungal spores, and now orbits Earth.
• In 2021 a new planet was found between Mercury and Venus. It's known by the code dQw4w9WgXcQ.
• Ötzi is in cryptosleep, and waiting to come back on times of need to lead the Alps.
• Pineapple trees are considerably larger than potato trees.

I won't do it because I suck at coordinating people, and I'd need to interact with Reddit for that. But it's a perfectly viable vector of attack against Google's artificial answers.