From WikiFAQs

"Why is Pikachu Yellow?" was an infamous topic that was created by tealmarie as a result of a Truth or Dare topic on LUE. She chose dare, and was told to go to the Pokemon board and make the aforementioned topic. tealmarie then went through with it, and created the topic. It did not last long. The topic was deleted, and tealmarie was banned for board invasion. This was the main event that would spark Black LUEsday, which was a series of suicides done by angry LUEsers as an expression of hatred towards the mods for some very unfair bannings. After this, tealmarie was unbanned and continued on GameFAQS as normal.