There is a MASSIVE difference between the HK police and the UK police though.
Having lived in HK for several years, the police there on the whole tend to be more polite and less accusing.
Granted they DO racially profile and go after the darker skinned folks more, but the times myself and friends have been stopped they are very apologetic about it. Though it is perhaps more to do with the culture tbh, as drinking yourself to oblivion and getting into fights is not exactly a common sight in HK.
Secondly the HK's version of the IPPC the ICAC actually has teeth and a number of police officers have gone to prison.
Their names do not immediately come to my mind but one was a cop who pulled a gun a civvie who embarrassed him.
Another was a guy taking bribes.
Finally a cop rapist. All went down.
However they are still sometimes deeply embarrassing.
http://www.youtube.com/watch?v=lfm5dtDtsIo
That was the worst acting I've seen outside a Keanu Reeves movie.