In the cryptocurrency field, airdrops are a common means of project promotion, serving both as opportunities and risks. As scams continue to escalate, users urgently need to master anti-scam strategies to avoid becoming victims of 'free pies.' Below is an in-depth analysis and practical guide:

1. The Core Tactics of Airdrop Scams

1. Phishing Websites/Fake Wallets: Forged official pages that lure users into entering their private keys or seed phrases. Typical cases include fake links impersonating wallets like MetaMask, where assets are stolen once users authorize.

2. Impersonating Project Parties/KOLs: Publishing false airdrop information through private messages on social media or forged accounts, such as impersonating Binance customer service requesting transfers or providing OTPs, which actually steal assets.

3. Malicious Tokens and Contracts: Airdropping worthless tokens to user wallets, accompanied by phishing links or inducing authorization of malicious contracts, resulting in asset transfers.

4. Fake Testnet Airdrops: Using 'zero-cost participation' as a gimmick, but actually stealing wallet permissions through test tasks.

2. Four Layers of Anti-Scam Firewalls

1. Information Verification: Obtain information only through the project’s official website, whitepaper, and official social media accounts, using blockchain explorers (like Etherscan) to verify token contract addresses.

2. Wallet Isolation: Use independent small wallets to participate in airdrops, avoiding exposure risks to the main wallet; immediately transfer tokens after receiving them to reduce retention risks.

3. Code of Conduct: Never disclose private keys or seed phrases, and refuse any transfer requests. Legitimate airdrops do not require payment of gas fees or sensitive information.

4. Psychological Defense: Be wary of 'high returns' and 'guaranteed profits' rhetoric, calmly verify unusual situations, and avoid anxiety-driven decisions.

3. Practical Security Advice

- Enable 2FA: Set up two-factor authentication for exchanges and wallets to enhance account security.

- Report and Isolate: If suspicious tokens or links are discovered, immediately report them to the platform and avoid interaction.

- Continuous Learning: Keep up with industry trends, join official communities, and prioritize participation in well-known project airdrops (like Arbitrum, Solana ecosystem) to reduce the likelihood of falling into traps.

Conclusion: The essence of airdrops is cognitive realization, not 'money falling from the sky.' Only by staying vigilant and verifying rationally can one safely benefit from the Web3 wave. Remember: scammers always target the principal, not promised returns. Protecting assets starts with cautious operation at every step!