I really hate it when I send an email to someone to just give a quick update on a project and the response is an attack on me and what the other person read between the lines.
The lines that didn't even exist.
Now, I know that email does a poor job of conveying tone. But there wasn't even any tone I tried to convey.
I sent a, "Hey, a quick reminder about XYZ and a suggestion" email and I got a, "I already know what you told me, don't tell me what to do, and furthermore, you made me mad the last time we talked and I'm going to tell you off now."