The same thing happened to us! I must admit I lost my cool, and I think they were taken aback! This man does not operate soley on his own. We were approached by a woman in her late 30's, and then he appeared. Whilst we were being shown all the delights of the shop, another man arrived, and seemed to take no interest in what was going on. When we left the shop, the man in the photo apologised and said he just likes to have some fun! I think threatening him with the police must have done it.
Maria & Tim