Only if the circumstances of the abductions were random, which seems doubtful. If, say, a significant number of those kids were taken by strangers in cars who l

Only if the circumstances of the abductions were random, which seems doubtful. If, say, a significant number of those kids were taken by strangers in cars who lured them over verbally, simply informing parents to push the "Don't talk to strangers" bit might alone prevent some future occurrences. Just because the number is small relative to the overall population size doesn't mean that there isn't some correlation between many of the incidents, on which some acceptable measures could be taken.