I needed help from the developer of a plugin to get it up and running on my wordpress site. It's a trusted vendor, so I went into cpanel and created an FTP account for them (per their request). They did the job and I went back in to delete it.
It was only after I pressed the "Delete" button that I realized there were two "delete" options"
1. Delete this user
2. Delete this user and all their files
My flash reaction as I clicked button 2 was "they didn't create any files so it doesn't matter".
My next reaction was "Oh. My. God. What. Have. I. Done?"
I then watched helplessly as my entire website was deleted. Everything. Gone.
Thank the heavens for Hostgator's regular backup. They were able to restore everything after a few nervous hours. But man, lesson learned.
Backup every day. And don't just click the first button you see!