Read this from my friend's blog... it's written in Mandarin though - http://bbs.news.163.com/bbs/photo/181381927.html
Short summary, tones of PGs shooting locals at Si Chuan (四川郎木寺), even when the locals kept avoiding the tele lenses by covering their faces. And many of them were so aggressive to point their lenses right in front of the locals faces.
Feel so sad for the people residing in the tourists spot in inner China. So it might be getting harder and harder for a PG to capture live portrait of locals if these things go on.