They’re creepy and they’re kooky — and also they’re a purple hamburger? Prepare yourselves, fans of weird fast food loosely inspired by major motion pictures: Burger King just announced a special batch of menu items inspired by The Addams Family. Who cares if the last one of those movies came out three years ago? Who cares if Wednesday hasn’t had a new episode in almost 24 months? It’s Halloween season and people want spooky stuff. And what is more spooky than a purple hamburger bun? That’s right; Burger King will offer a “Wednesday’s Whopper” featuring a purple bun. It’s one of four special A…