Block Image Stolen Spam Form Entries

Hello,
We like millions of forms are getting a variation of this same image stolen spam message over and over:
“`Hello there!

This is Melynda and I am a professional photographer and illustrator.

I was puzzled, putting it lightly, when I recognised my images at your website. If you use a copyrighted image without an owner’s approval, you need to be aware that you could be sued by the creator.`”

It is always from a Mel and always contains a sites.google.com malware link. Would it be possible to have the plugin detect these unique circumstances of Mel + sites.google.com link and block those too? Below is an article detailing the same spam form submission. Google shows 6 million+ similar hits for it as well.

https://mywebmaestro.com/new-malware-trick-form-spam/

Thanks in advance!