Interesting article that ran last night here in HK. I didn't realize that HK had some restricted areas. I have seen youtube videos of people flying both well higher than the limit and directly above densely populated streets here in HK. My worry is that one $hithead is going to ruin it for the rest of us who respect the limitations (of our flying ability as well as the regulations.)
http://mytv.tvb.com/news/pearlreport/173163
http://mytv.tvb.com/news/pearlreport/173163