Never use a knife with a non-locking blade for anything more strenuous than cutting soft cheese. If you like the back of your fingers.

I don't understand that argument at all. I'd use my Swiss Army knifes to cut anything even as hard as wood. The blades open only up to 180 degrees of angle. There is no way the blade could ever come on the back of my fingers when I cut. All blades in that knife only have one sharp side. However, if someone tried to cut with the back of the blade which isn't a good idea for another reason too, she possibly could cut the back of her fingers.

The locking function would only be needed if a knife is used for stabbing. In that case the Swiss Army Knife is a bad choice which could hurt the stabber and not only the person on the receiving end. Stabbee?

Wolfgang