Things decorating page-proofs I got back today from a proof-reader

Other than blue pen, red pen, and pencil marks (all acceptable and expected), certain pages were decorated with:

Giant tea ring from a dripping mug
A short, straight hair
Bright red spots. Blood? Hot sauce?
Yellowy-brown smears that are certainly either blood or chocolate

What the hell? Is it too much to ask that if we’re paying you to read something you can refrain from using it as a napkin/coaster?