OP
OP
and a seatbelt.
Using good practices in training a new user how to use a knife to keep it from folding when they don't want it to fold is vitally important, but engineering safety devices are ahead of good practices in the safety control hierarchy. Reliable locks on folding knives to prevent the blade from folding when the user makes the all too human mistake of incorrectly applying those good practices is why engineering controls are always ahead of the people dependent controls.
Of course the top of the safety list is to remove the hazard, which in this case would be stick with fixed blades and stay away from folders that need locks and good practices to keep them from folding when you don't want them to fold. But then we'd port over to the "EDC fixed-blade thread" and debate guard or no guard.
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