http://consumerist.com/2007/12/07/riot-police-had-to/

Riot police had to be called to quell 120 angry Chinese tourists in the Vegas-like resort territory of Macau. The tourists complained they were being forced to shop even though they were on vacation to gamble, and they began rioting after their tour guides took them to a cold beach and locked them out of their tour busses. [Reuters]