Historical clue formulations

• "Don't be ___" (words of caution) — 2018-03-24
• "Don't be ___!" — 2018-02-04
• "Don't try to be ___" — 2012-07-25
• "Don't be ___" — 2011-03-24
• Thackeray's "Vanity Fair: A Novel Without ___" — 2010-01-30
• "Holding Out for ___" (1984 Bonnie Tyler hit) — 2008-11-04
• "No man is ___ to his valet" — 2001-11-17
• "Billy, Don't Be ___" (1974 hit) — 2001-02-01