Every country/city that has lots of tourists have to deal with unpleasantness. Some of the Chinese tourists cause problems in Thailand, Vietnam, France, Canada just to name a few. Then there are the sexpats in many asian countries and places like Cuba or the DR. The hordes of drunken westerners in package tours to cheap all inclusive resorts in places like Mexico, Cuba, Spain.
HK is part of China and has a land border(for now) so it's unrealistic to think that it's going to change, it will only get worse as HK gets closer and closer with China. If there is illegal activity then there can be a crackdown but otherwise that's the way it will be. There will always be plenty of people willing to make money from this and unless you start depriving people of their civil liberties which many always seem to be very concerned about, Chinese tourists have as much right to be here than anyone else and as long as they don't do anything criminal, they are free to behave as they wish however unpleasant that may be. Best you can do is to try to promote and educate.