There are lots of examples.
Most famous one in Virginia,
which I've talked about before (2013), is Sarnir R. Farran, et al. v. Olde Belhaven Towne Owners Association (from HOA Leader):
During the 2008 election season, Sam and Maria Farran placed a political sign supporting Barack Obama in the front yard of there home in Fairfax County, Virginia, an area of suburban Washington, D.C. The sign was four inches larger than the maximum sign size permitted by the governing documents, so the board requested that the sign be removed. The Farrans responded by cutting the sign in half, so that two signs complying with the guidelines were formed, reading “OBA”, and “MA”. The board responded by fining the Farrans, and in turn, the Farrans filed a lawsuit against Olde Belhaven Homeowners Association, claiming that the association did not have the authority to levy fines. After a four year battle, the Court ruled that such fines could only be assessed “if the association’s declaration expressly allows it to impose fines or its declaration expressly allows it to adopt rules or regulations which impose fines.” Since the declaration was silent regarding fines, the Court ruled for the Farrans and awarded all attorney fees and costs to be paid by the Association. The association dues were raised from$650 per year to $3500 per year to cover the legal fees and costs, ultimately ending in bankruptcy for the association.
See opinion letter:
pages 1-3 pages 4-6 and court order Note: The Association had to declare bankruptcy because of this case:
How A Homeowners Association Went Bankrupt Because Of One Obama Yard Sign from The Consumerist
Fairfax homeowners group humbled by court battle with residents The Washington Post
Due Process Changes in Virginia