Most community managers underestimate the power their community has.
If you run a community, you should frequently collaborate with members to issue a 'statement from the community'.
It might be about a news story, a product development, a congratulatory message. If you do this well, the statement carries great meaning. A shining endorsement or a devastating criticism.
It also unites members, increasing the bonds and is a great promotional tool if it’s picked up by the press. So send it to press outlets too. Enable comments, comment on responses to it. It might even create the change you want.
So why aren’t you regularly issuing statements from your online community?