If you try to stab somebody with a SWAK, there is an excellent probability the blade will fold back on your own fingers.
Besides which the blades are stainless and will likely bend if stuck into live tissue.
Well, you might poke the awl in about half an inch if it doesn't fold on your fingers.
In a self-defense situation, I can do nastier damage to the opposition with my keys on a ring -- and keep my fingers.
On the other hand, box cutters are serious weapons, as we have sadly seen