In his Chicago Tribune blog, Eric Zorn annually lists various song parodies he and his fellow seder guests sing at the seders Zorn and his wife attend. (Mrs. Zorn is Jewish.) According to his March 18, 2010 post, he wrote "Super-Kosher Manischewitz, Exodus and Moses" to the tune of "Supercalifragilisticexpialidocious," the famous Mary Poppins song. The post is here: http://bit.ly/cBN2Mp
On one hand, that's fine. This isn't Yom Kippur, after all. If Eric, his wife and other seder guests want to have a little fun at a truly joyous occasion, they should knock themselves out and have a good time. Publicizing this rite of spring might persuade others the seder isn't a drag. Perhaps that Jewish minority that doesn't attend seders might be show up for one.
On the other hand: I can hear family members screaming at me because I make seder requirements so restrictive. Just one restriction: the seder must be kosher for Passover. Zorn doesn't indicate whether his seder is kosher or not. He may not know. Regardless of whether his seder is kosher, I'm pretty sure it doesn't matter to him. He's not Jewish, but just as important, he doesn't grasp the gravity of the importance of the holiday. We escaped from Egypt--not just physically, when it actually happened, but spiritually, every Passover. Zorn misses out on that spiritual component of Passover, and that plays a very important role in a seder. For that reason alone, the seder must be kosher for Passover.