Historical clue formulations

• Scrawl graffiti on, e.g. — 2009-04-23
• Give bad marks — 2008-07-20
• Scrawl graffiti on, e.g. — 2006-06-12
• Give bad marks — 2002-09-29
• Vandalize — 1998-02-03
• Mar — 1996-04-16