Here is a list of some well known simpsons sites that have been issued "c&d's"

D'oheth

Last Exit to Springfield

Pick's Tribute to the Simpsons

I Can't Believe It's a Simpsons Site

Simpsons Experience

The Simpsons Mainframe

and so on and so forth - you get my point!

Most of these places are still open and that is what I would say to do - leave the place open with legal content.