How did you get involved with that? Did you just phone up and offer your services?
"Hello, I have information that would likely be useful as evidence for the antitrust lawsuit against Google."
"Thanks, but I think we have it covered" -or- "Thanks, let me take a note so we both feel good about this interaction and never actually follow up on this."
When the GP said "Doing something > doing nothing", try to see the value in such a mindset, irrespective of whether or not some action was taken by person on the receiving end of the information.
If nobody voices their concerns, the people have no voice.