Steven Seagal
It’s unclear what made Steven Seagal “hard to work” during his hosting stint on Saturday Night Live in 1991, but he’s never been permitted back. Moreover, during an on-air monologue with Nicholas Cage in 1992, Lorne Michaels referred to Seagal as the greatest jerk to ever host the show.
The Replacements
The Replacements, a legendary Minneapolis punk band, were prepared to explode into the mainstream when they were booked for a 1986 appearance on Saturday Night Live, but they promptly blew that opportunity. According to Rolling Stone, the ‘Mats (as their fans refer to them) “got drunk, said the f-word just off mic during their first song, switched clothes for their second, and rang up $1100 in hotel damages.” Lorne Michaels was so enraged by the band that he threatened to ban all artists from Warner Brothers Records as a form of vengeance. The restriction was eventually limited to The Replacements.