Maybe it's time for the free market everyone talks about to work it's magic 
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.Yeah, victims and/or charities should pay people to compile the evidence. I certainly don't expect forum moderators to do these investigations.
But... how will those third parties have access to certain information, like IP addresses?
Isn't there potential for abuse in case you give those records to "external investigators" who ask for them?
Or did I misunderstood what you meant?