I'm with you on this! A sliver or a small, occasional, "ecery day" nick, is typically no big deal. A screw that is driven all the way into any part of your body could get really bad, really quick! I recently had to go to the local ER for a nasty cut on the back of my hand. Because I was working around my drill press (it was off) when I got hurt, the dr wanted an x-ray to check for foreign bodies. The images showed lots of metal particles, that if left, could have caused a nasty infection. As it turned out, each of the stitches wound up infected afewdays later, so I got antibiotics for that. Yes, I have used tape or super glue to seal up a cut or two over the years, but military First Aid taught me to never, ever remove things from a puncture wound because it could cause you to bleed out immediately.