Emoji in client emails cause complete note failure

This has been a constant issue but I wondered if anyone had found a workaround yet. We allow our clients to reply to tickets via email, and the email reply can also re-open the ticket. 

We get a LOT of people who reply to a ticket with a "Thanks!" and smiley face emoji. That causes the ticket to re-open, but no note is included.

Is there any way to strip emojis out of an email before WHD processes it?