I got stopped by one at IFC a couple of weeks ago. Security guard moved him on before he had a chance to ask for any money so I just thought he was a bit of a weirdo. Then another one today tried to talk to me at Pacific Place but I just smiled and ignored him as I had my earphones in. Interesting to read this thread. Never heard of it before and I've lived in Hong Kong for four years. Is it on the increase?