In general, the traps used by VC insurgents were not as "primitive" as they are usually depicted in the popular culture of the war. They were encountered, sometimes as stand-alone traps, sometimes as something the VC would lure into during a firefight - but not in a widespread sense nor something an ordinary soldier would encounter on every hump. What was far more common was mines (concealed as booby traps or not), and that was the true psychological weapon in this context, which could lead to far more devastating effects than to ones personal psyche. Mines found in the outskirts of villages could lead to retaliation against the whole village.

I've written a more extensive post on the use of psychological warfare by the VC and how the booby traps fit into this category here.