Siri has always been polarizing app. Some find the service to be legitimately helpful and use it regularly to perform various tasks; others have nothing but trouble in getting Siri to understand basic commands or return relevant information; and, there are reports that suggest that most users flat out ignore Siri's existence all together. It looks like The Simpsons falls into that second category...
Source: http://www.phonearena.com/news/Siri-burned-by-The-Simpsons_id49026
Source: http://www.phonearena.com/news/Siri-burned-by-The-Simpsons_id49026