Serves You Right, Twit

Booby traps are so named for the idea that a foolish person, or boob, will set them off. Since these traps are by nature difficult to spot and easy to set off, it hardly seems fair to question the victim's intelligence.

If booby traps let off some kind of audible alarm when you got close (WARNING! WARNING! DEADFALL AHEAD!) or were set where no one would find them (at the bottom of a well), THEN you'd be a boob for setting it off.

Somewhat related: a literal booby trap would be a devestating blow to breast-loving armies of the world.