of course, common sense prevail. e.g. don't go around and tell people how pricey and how authentic they are. that is attracting trouble.
china does have its criminals. but a few things about china works in your favor
1. culturally chinese are law abiding -- 2000 years of education on obeying authority
2. there were tight control and severe penalty back in the Mao era, still ripple through today (though weaker).
3. as indicated above, too many people wearing fake (eg rolex), it is hard for the average thug to know what is real