Any celebrity worth his salt will have his fair share of crazy fans. Like, Chinese star Wu Lei whose identity card information was sold online, which led to a stalker using his frequent flier miles. 

Now, Taiwanese singer and Sodagreen frontman Wu Qing Feng, 38, has called out a bunch of very creepy people on Instagram. The post, which was written on November 2, was directed at three very specific groups of fans.

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