At least the last couple of years. In fact, actual court cases have been fought about their meaning, those cases included actual depictions to try to point out

At least the last couple of years. In fact, actual court cases have been fought about their meaning, those cases included actual depictions to try to point out that some were meant to be whimsical, and some were meant to be serious. https://news.bloomberglaw.com/bloomberg-law-analysis/analysis-getting-emojis-into-evidence-is-no-laughing-matter https://news.bloomberglaw.com/bloomberg-law-analysis/analysi...