Data mining can happen without any of that, everything you post in the fediverse is literally available for anyone to see. Realistically, the most harm they can do is build controlled communities that grow so huge that they drown out all of the fediverse’s open communities.
Considering that there’s a side quest in to where a rock connoisseur is looking for a rare type of flint, I’d say theres definitely different flavors of rock. And in terms of cooking, the gorons have grills where they literally just cook rocks. I’m not sure if they’re trying to metamorphize them into different rocks or what’s actually going on, but they don’t eat their rocks raw. I wonder if concrete would be like a soup for them?