https://github.com/barak/latex-coffee-stains
Here it is in case anyone's interested

What if I drink tea?

When I used LaTeX many years ago, I loved this. Or was practically impossible for to overlook that I had opened a draft version that I didn't want to send.

The tenure commitee was on the fence until they learned that he authored this package.

Is there one that adds fold creases?

Relevant "Nearing Zero":

I'm sure there was a good reason to make this. I just can not imagine what that reason would be.