I just use the blunt end of the handle of a small, flat-head screwdriver to squish them down. And the driver side makes for an easy way to pry the staples.
Do they make a Jackhammer small enough to use on staples? If they do I will go get one right now!!!! BAM!BAM!BAMMMMM!
Hey I'm not knocking on him. It's a good idea to serve a purpose and possibly didn't cost him anything but a little tinker time. I still flatten my staples out with a linesman's pliers. I saw a flat clinch stapler at a local discount store for $6 and seriously though about buying it as a dedicated 2x2 stapler.