I beg to differ, a lawsuit is the sincerest form of complaint there is.

Here's a few more examples:
http://en.wikipedia.org/wiki/Oncale_v._Sundowner_Offshore_Services
California, US, 1998
A male oil-rig worker complains that he is repeatedly subjected to sexual harassment by his male coworkers with the acquiescence of his employer.
"Oncale v. Sundowner Offshore Services set the precedent for analyzing same-sex harassment, and sexual harassment without motivation of "sexual desire", stating that any discrimination based on sex is actionable so long at it places the victim in an objectively disadvantageous working condition, regardless of the gender of either the victim, or the harasser."

http://en.wikipedia.org/wiki/Joseph_Darby
Abu Ghraib, Iraq, 2004
Joseph Darby complains that members of his unit are torturing inmates of the infamous prison.  Impact of this is still evolving, but you can thank the guy for risking his life so that government officials will be more reluctant to torture people in the name of "Freedom".

http://en.wikipedia.org/wiki/Christoph_Meili
Zurich, Switzerland, 1997
Christoph Meli, a bank guard, complains that his employers are destroying financial records for deceased Jewish clients (some of whom would likely have been Holocaust victims), so that the bank can keep their money.

http://en.wikipedia.org/wiki/Frank_Serpico
New York, US, 1970
NYPD officer Frank Serpico complains about police corruption in his department.  He was the first.  It took some time before media officials dared to pick up his story too.

http://en.wikipedia.org/wiki/Jeffrey_Wigand
Kentucky, US, 1989
Dr. Jeffrey Wigand, Vice President of R&D at Brown & Williamson Tobacco Company, complains that his company is intentionally manipulating the effect of nicotine in cigarettes.  He is later fired and financially ruined, taking a job as a school teacher for 1/10th of his previous salary.

http://en.wikipedia.org/wiki/Brown_v._board
Kansas, US, 1954
Thirteen black parents from four different US states complain because their children are racially segregated and not allowed to attend "white" elementary schools.  You can bet they didn't all wake up at 3am with the same idea in unison.  Oliver Brown was the first to complain and contact a lawyer.  Volumes of law are changed or entirely thrown out because of this case.

edit: formatting cleanup

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