A copy of an article I found on another blog:
Employees at Japanese store Akiba Yodobashi mistook one excited Nintendo fan, dressed in an incredibly accurate and high quality Luigi suit as an actual Nintendo representative. He was invited up onto a stage and conducted the opening ceremonies - handing the first Wii console to the first customer.
Shortly after the opening ceremony, store employees realised the Luigi was in fact not from Nintendo and just an eccentric cosplayer - at this point he was whisked away out of the store.
Better than shootings, that's for sure.
Snively speaking now, here's the sad part about all of this. I watched a news broadcast online covering the Japanese Wii launch and saw this Luigi handing out the Wii and hamming for the camera and doing all sorts of promotional stuff. The next day at school I mentioned to a friend that it was kind of weird that it was Luigi and Mario was nowhere to be seen. It would just figure that the Luigi I saw was a fake, just goes to show how plugged into the video game news world I am!