This might be better served in the shame yourself thread but my first job out of college was direct sales for a cell phone company. I sucked at it so I spent most of my time goofing off and playing on the internet. I had gotten one of my friends a job there and one day I sent him an email from my company email address. It was one of the infamous email in the early 2000's that when you opened it would somehow maximize the speaker volume and a voice would yell "Hey everybody I'm watching porno over here!"
Only problem was I didn't send it to my friend Chad Smith, I sent it to the Chief Financial Officer Chad Smith in Pittsburgh, PA.
I can only imagine his reaction to opening that email. So anyway I show up to work one Monday and get called into HR where they put me on last chance warning. I quit a month later.