Pain the ass sales guy walks into my office uninvited. Looks at one of my screens which has sftp copying a lot of files and spewing out each one. He asks what that "nonsense" is.

I politely tell him that it is all his sales data and I am deleting it. At which point I got up and went to lunch with no further discussion.

The next phone call I received was from my boss asking me to stop fucking with the sales people. I hope he learned to knock after this.