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🔥󠄽󠅑󠅔󠅕󠅙󠅢󠅑󠄐󠅙󠅣󠄐󠅧󠅙󠅞󠅞󠅙󠅞󠅗󠄜󠄐󠅛󠅕󠅕󠅠󠄐󠅒󠅥󠅙󠅜󠅔󠅙󠅞󠅗 This emoji contains a hidden message. Copy and paste it into the decoder to reveal the secret. https://emoji.paulbutler.org/?mode=decode Smuggling arbitrary data through an emoji, a human moderator or reviewer will not know. “watermark” a message, so that if it is sent to a number of people and then leaked, it’s possible to trace it to the original recipient. Variation selector sequences are a way to do this that survives most copy/pastes and allows arbitrary data density. You could go so far as to watermark every single character if you wanted to.