That's what you get when you use lossy compression, and it's hardly a problem unique to Xerox scanners. Maybe important documents should be scanned to a higher resolution so you don't have problems like this.
I doubt Xerox would be arrogant enough to try shifting responsibility to the victim like that. Do you reverse engineer every product you use just to confirm that the designer didn't cut corners to make it work differently from every other example of a familiar class of product?
It's particularly absurd in this case since it's clearly not easy to learn that lossy compression is being applied or how one would disable it if they wanted their Xerox to work like every other copier/fax they've used.
