came across this during an AE 2004 dan vs gade match.... see 4:47 http://www.youtube.com/watch?v=BDMrQs9vL_E
im surprised lin dan didnt complain to the umpire there, the camera even found the dude who's high on the whistling
I don't the whistle is that big of a deal. If you watch the 2006 Thomas Cup finals with LD VS TH, you can see XXF on the side line cheering with a whistle in her mouth.