Once I uploaded some files on my rented host server. Those are just some text files without extension but their names contained some copyright names like Adobe Photoshop, Illustrator. Those actually was some instructions about those programs I uploaded for some client. Host customer service I guess though those were actual applications and deleted all those files without noticing me. I was warned before my host account deletion not to do that again. I sent a few emails explaining to the idiots, but nothing.

Good thing I always keep multiple backups, so no problem there. But imagine the stupidity?!