Historical clue formulations

• "Don't waste your time" — 2023-05-16
• Hopeless — 2022-11-12
• Totally pointless — 2022-01-31
• Pointless — 2020-10-10
• "It's futile" — 2019-05-18
• Pointless — 2018-05-18
• "It's ___!" (defeated cry) — 2014-04-21
• Futile — 2013-01-15
• "It's ___!" ("I give up!") — 2010-06-16
• Pointless — 2009-09-04
• "It's fruitless" — 2009-06-13
• "Don't even bother" — 2008-07-20
• Hopeless — 2004-10-31
• "Don't even bother" — 2003-12-31
• "Don't even bother" — 2000-11-26