I got my own idea why Nintendo's forums were closed.

[Insane Asylum]

Pirate-Ninjas killed Andy because he knew too much.  Too much about...the plan.  The plan to use the Wiimote and Nunchuck to teach kids how to kill efficiently and brainwash them so that they destroy Sony and Microsoft with their newfound combat skills when they hear the trigger phrase "Asparagus Lube" during a game of Link's Crossbow Training.

And that's how I became King of Canada. :O  Discuss.

[Johnny Ringo]

I thought that Andy had been kidnapped as a child and mentally conditioned by microsoft to serve as a sort of sleeper cell inside Nintendo to spy on them. A few weeks prior to Halo 3's launch Microsoft would contact Andy at the office with a special code word designed to trigger the shut-down of the forums once used.  >_>

[Termanian_Knight]

"We should've done this years ago!"