Facebook has also cancelled two New York-based events due to take place this week - an engineering open-house day planned for Tuesday (30 October) and the announcement of an update to its fledgling "Facebook Gifts" service.
The company's in-house lawyers filed an average of 100 lawsuits a day for each day the courts were open, the state says, while its outside counsel filed another 20, 000 lawsuits.
Its City Council House 2, with windows that open at night to take in air that cools the interior by day, was the first public building in Australia to get a six-star green rating.