I received a long and involved email from my editor today. She sent it to all of her authors (not just me, thank goodness!) summarizing the plethora of mistakes and head-thumpers she's received in her inbox lately. Asking us nicely not to repeat these same mistakes.
The tone was fairly business-like until I reached the end.
"...You know that God kills a kitten every time you make your editor cry, right?..."