I just think it is a slippery slope where the ratio of false leads to legitimate tips weighs too heavily on the former for this to be practical and not threatening to real families when someone wants to play the hero. I'd be interested in seeing statistics about the percentage of abductees that are allowed to be seen in public without any sort of cosmetic alterations or other such obscurations, particularly in the first few months/years. Perhaps their captors are more lazy about that than I'd assume.