If your printer had a "reverse" button, it might work something
like the modded Xerox laser printer cooked up by InventGeek's Jared Bouck. After gutting most of the printer's
internals, Jared added new circuitry and a shredding unit, with the end result being a desktop shredder that can slice
through 25 pages a minute. Of course, the mod ended up costing more than many pre-made shredders, and you can forget
about using your laser as a printer once you've done this, but if those things really matter to you, chances are you're
not going to attempt this mod in the first place.