News.com.au reports Facebook declined to remove the page, arguing it cannot stop people taking photographs in public.
The row comes just a few days after Facebook shut down a page rating under-aged sex partners. That page has since re-surfaced. The company was also the subject of pleas from Australian authorities to remove material with the potential to prejudice a murder trial.
More:
http://www.theregister.co.uk/2012/10/21/facebook_wont_pull_unmarked_police_cars_page/