A choir of staggering awfulness

As I watched this video, which is truly toe-curling, I kept asking myself “why?”  Was this a retirement home joke, with the seniors gleefully anticipating a viral video?  Did an evil choir director sadistically take advantage of a vulnerable population?  Can a group of performers actually be this atrocious without deliberately aiming for that level of incompetence?

You decide:

[youtube]http://www.youtube.com/watch?v=ItMJtA8vfpw[/youtube]