Comment by jl2718

I would like to hear the strongest case for the privacy trade-off. How many more children will be physically recovered versus existing methods? What is the reduction in money flow to abduction activities?

This might be naive, but I would guess that the best way to fight this kind of thing is to let people know more of the case details. People would protect themselves, find the crimes, and stop unwittingly supporting them. For instance, if it can be shown that cryptocurrency or encrypted messengers are used to a significant extent, the community will either find a technical solution, or stop using it.