Casey Kasem Quit Scooby Doo in Protest Over a Burger King Commercial

Casey Kasem, who created the first voice of America's Top 40, also created the original Shaggy voice from Scooby-Doo. He began portraying Shaggy in the 1960s and continued performing voices up until a few years before his passing in 2010. However, there was a moment when Kasem genuinely left the show in protest.

Between 1995 and 2002, Kasem declined to perform Shaggy's voice since the actors were going to be featured in a Burger King commercial. Kasem, a vegan and ardent supporter of that way of life, was allegedly disappointed that Hanna-Barbera, the animation company that created the program, decided against making Shaggy a vegan as well. To be fair, Shaggy's schtick for years had been that he ate everything and everything with a ravenous hunger.

Kasem not only rejected the advertisement but also completely left the program for seven years. Shaggy only came back when the producers gave in and agreed to make him a vegetarian.