The folks at the Center for Media and Democracy have done incredible work documenting fake grassroots or "astroturf" groups.
Here, they're helping protects the rights of all Americans to exercise their right to vote.
They are completely non-partisan.
The non-profit, non-partisan Center for Media and Democracy (CMD) has launched a unique website to help safeguard the fairness and integrity of US elections, using the power of citizen journalism. The Election Protect Wiki is now online at EPWiki.org. It enables citizens, journalists and government officials to actively monitor the electoral process in all 50 states and the District of Columbia. CMD and its community of volunteer editors will continue to improve, expand and update the EP Wiki beyond the upcoming November 4th election.
The EP Wiki is part of CMDs award-winning SourceWatch website and operates on wiki software which allows anyone who registers on the website to participate in creating and updating articles. SourceWatch contains in-depth articles on every member of (and most candidates for) the US Congress at Congresspedia.org . CMD employs both professional and volunteer editors who work together online to ensure articles are accurate, fully documented and fair.
These guys are the real deal.