Decentralized communication is becoming an important use case within Web3. On Ethereum, users can repurpose the transaction input data field to embed natural-language messages, commonly known as Input Data Messages (IDMs). However, as IDMs gain wider adoption, there has been a growing volume of toxic content on-chain. This trend is concerning, as Ethereum provides no protocol-level support for content moderation. We propose two moderation frameworks for Ethereum IDMs: (i) BUILDERMOD, where builders perform semantic checks during block construction; and (ii) USERMOD, where users proactively obtain moderation proofs from external classifiers and embed them in transactions. Our evaluation reveals that BUILDERMOD incurs high block-time overhead, which limits its practicality. In contrast, USERMOD enables lower-latency validation and scales more effectively, making it a more practical approach in moderation-aware Ethereum environments. Our study lays the groundwork for protocol-level content governance in decentralized systems, and we hope it contributes to the development of a decentralized communication environment that is safe, trustworthy, and socially responsible.

翻译：去中心化通信正逐渐成为Web3的重要应用场景。在以太坊上，用户可重新利用交易输入数据字段嵌入自然语言消息，这类消息通常被称为输入数据消息（IDM）。然而，随着IDM的广泛采用，链上毒性内容数量持续增长。这一趋势令人担忧，因为以太坊协议层面并未提供内容审核支持。我们为以太坊IDM提出两种审核框架：（i）BUILDERMOD——由区块构建者在区块构建期间执行语义检查；（ii）USERMOD——用户主动从外部分类器获取审核证明并将其嵌入交易。评估结果表明，BUILDERMOD会产生较高的区块时间开销，限制了其实用性。相比之下，USERMOD能实现更低延迟的验证并具备更优的可扩展性，使其成为具备审核意识的以太坊环境中更实用的方案。本研究为去中心化系统中的协议级内容治理奠定了基础，我们期望其有助于构建安全、可信且具有社会责任感去中心化通信环境。