It doesn't bother me any more than giving me a slight chuckle, but the one thing that comes to mind was flicking through a men's fashion magazine a few months back. There was a series of about 8 images that still had all their 120 edge markings left around them, only they were all the same frame number. Either the photographer had incredible luck with frame number 7, or he/the editor is just really lazy.
For me it's just like spotting spelling mistakes in a publication. It's nothing more than amusing.