For those hating on the Nintendo forums, it wasn't all bad.
Before E3 2005, the forums were actually really good. It was the only place I could get a semi intellectual topic going on the video game industry. The GameCube forums were great and people were generally friendly. It was a good forum until the Wii was revealed. Since then, a lot of spammers started hitting up the site and a lot of kids started coming on the site as well. The forums died fast and the admin there couldn't care less. The NOAs didn't moderate the forums well and the mods (who were just regular members who were not paid) were only able to do so much.
It was once a good forum (probably the best I have ever been on (besides CAG)), but since the Wii was revealed, the forum got worse and worse.