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Core Viewpoint - The WeChat Security Center has issued a warning against illegal activities such as pyramid schemes and fraud organized through WeChat groups, emphasizing the potential for permanent account restrictions for participants involved in such activities [1][4]. Summary by Sections Recent Complaints and Actions - WeChat has received complaints regarding accounts involved in organizing pyramid schemes and fraud within groups, using deceptive tactics like claiming to unfreeze national assets or promoting blockchain-related investments with high returns [1][4]. Consequences for Violators - Accounts found to be violating regulations will face tiered penalties based on the severity of the violations, including potential permanent login restrictions and disabling group functionalities for confirmed violators [4]. Common Fraud Techniques - Fraudsters often disguise themselves as official entities, using fake documents and claims of government support to lure users into investing in fictitious projects, such as "historical national assets" or "blockchain virtual currencies" [10][13]. Warning Signs and Precautions - Users are advised to be cautious of promises of high returns with low investment, especially those claiming to be secret government projects. Participation in "referral" activities or downloading unknown apps is also discouraged [13][14][15]. Target Demographics - Scammers frequently exploit the trust of elderly individuals in official institutions, urging them to join pyramid schemes and recruit others, which is illegal [17].