Here's a fun example of astroturfing in its purest form: A woman attending a town hall event for Rep. Steve Kagen (D-WI), and--while loudly raising objections to the Democrats' health care reform proposal--insisting she's just a regular concerned citizen. Except, she's actually a GOP official.

Heather Blish was vice-chairman of the Kewaunee County GOP until 2008. She actually worked for Kagen's opponent, and, according to her own resume, is affiliated with the Republican National Committee.

I'm sure this is the only time this has ever happened. ;\)
"I guess I want smaller government and my Social Security". - Tea Party Member