I recently started adding random emojis and lyrics to gmail addresses, it isn't usually shown so it's a nearly-steganographic rick-roll.

example+Youre+the+best!+Around!+Nothings+gonna+ever+keep+you+down@gmail.com

Too bad the music emoji is stripped by HN!

PS: Emoji in titles also make things like Youtube videos and blog posts pop quite a bit when shared via social media.