Ethereum co-founder Vitalik Buterin has backed a move by X engineer Haofei to make "Likes" private on the decentralized social media platform Farcaster. Buterin suggested the use of zero-knowledge (ZK) technology to ensure users' likes are anonymous, preventing the misrepresentation of true preferences due to social pressure. ZK technology, which Buterin proposed borrowing from Zupoll, allows one party to prove a statement is true without revealing confidential information. Haofei confirmed the platform would be making likes private, arguing that public likes incentivize the wrong behavior.