I hope it's toggable, i don't want this, people will use stupid filenames. Actually, Rodolfo, when you make the user system.. maybe you could make it so users get a folder like domain.com/user1/image.png or domain.com/username/image.png.
I still prefer a secure URL as i had the free version of Chevereto before and the only thing that was wrong was it used the original filename.