What do I think about emojis? Hmm... Don't even know...

https://www.vice.com/en/article/wxnj49/this-string-of-emojis-is-actually-malware

https://cybersecuritynews.com/hackers-can-use-emojis-to-deliver-exploit-to-the-target/

First two results by searching "emoji exploit" on the webs.

I have nothing against the other two things but they are not to be in any program source code either.