Booby traps are not legal and should stay that way because they are indiscriminate and could hurt people you do not intend to, including yourself.
Say you have a medical emergency and tragically die at home, and someone calls for a wellness check on you after weeks or months. If you have your house trapped for "protection," the first police officer that gets through the door ends up blasted by a rigged up pipe shotgun for no good reason.
From the viewpoint of a "traditional household" that's exactly how they view their kids, and that's what they really mean by parents' rights. The continued treatment of their kids as a blank slate to impress their values on by any means necessary, including and especially abuse, is extremely, extremely important to conservatives.