It's been a while since I've read anything as ignorant and absurd as this. A knife is a tool, and an OTF auto is merely a knife. A knife can be used as a weapon, and any knife can be used as such. It's clearly obvious that you've never held an OTF auto in your life. If you have, you would know that your "scenario" is completely ridiculous. There are 2 kinds of OTFs, single action and double action. S/A autos are fully sprung along its action, but the strength of the spring, while certainly enough to cause injury if you're dumb enough to put flesh in the way, is a small fraction of the force a motivated individual can do with his own muscles. Put more plainly, if a guy is going to stab someone with a S/A OTF, he'll just stab him, rather than expecting the spring to do all the work. Then there's double action OTFs. These "coast" along the action after the initial spring, and stop if anything substantial is put in front of it. Most won't even lock up if you put a single piece of paper in front of the blade. They'll put a neat little hole in you if you're dumb enough to fire it into flesh, but again, using your actual muscles will do many, many times more damage.
You clearly have absolutely no clue what you're talking about.