A lesson of courtesy

If you are learning from Professor Sheriff Luk, programme director at Hong Kong Polytechnic University's Graduate School of Business, be careful, don't show too much courtesy to him.

Quoting from Mainlanders blast retail service:
"Staff at retail outlets are always told to be courteous and smile at their customers, but this is just too artificial," Luk said. "Sometimes mainland tourists would like to be treated as ordinary customers. Being patronising could be another kind of discrimination."
More quotes from an article in Apple Daily (Chinese):
"他 促 請 從 業 員 招 呼 客 人 時 ， 應 以 真 誠 的 態 度 相 待 。"

Is he too naive or something? How much sincerity could you expect from a salesperson?

Maybe he enjoys the publicity from such idiotic comments but it does no good to the reputation of the school/program.