Red flags:

• "Send crypto, get more back" is never real. No celebrity, company, or exchange does this. Ever.
• Spoofed or hijacked accounts. Check the verified-since date and follower count — recently-verified accounts with generic names are suspicious.
• Fake live transaction feed. Hardcoded or scripted, meant to manufacture social proof.
• Urgency / countdown. Manufactured pressure to bypass rational thought.
• Irreversible action. Once ETH leaves your wallet, it's gone. No chargebacks on blockchains.