Unit Anti-Terrorism of the Public Prosecutor's Office in Istanbul has carried out an interesting operation. It was revealed that groups linked to ISIS used the decentralized messaging platform Rocket Chat as a secret communication channel. The investigation determined that organizational propaganda and recruitment activities were conducted through this application. An operation was initiated against the suspects. Although privacy-focused communication tools in the Web3 world promise freedom, malicious uses are on the radar of regulatory authorities. Decentralized structures do not offer absolute anonymity.