Protesters in Hong Kong besieged police headquarters late into the night Friday, throwing eggs at the building and drawing graffiti on the walls, before ending a day of demonstrations in the Asian financial center with their demands unmet. Some demonstrators said in TV interviews that they had made their point but were disappointed that neither the police nor government leaders had come to talk to them. Hong Kong has been rocked by major protests for the past two weeks over legislative proposals that many view as eroding the territory's judicial independence and, more broadly, as a sign of Chinese government efforts to chip away at the freedoms of the semi-autonomous city.