We're the scary aliens other ETI's make sci-fi horror movies about.
"...and they wield GREY GOO that turns *everything* it touches into nutrients they lap up in their flappy appendages..."
“They’re Made out of Meat” https://www.mit.edu/people/dpolicar/writing/prose/text/think...
I could have done just fine without learning about "grey goo" today thank you very much.