DOS Attack Against Los Angeles Schools
LA officials defended the move, with that city’s police chief dismissing the criticism as “irresponsible.”
“It is very easy in hindsight to criticize a decision based on results the decider could never have known,” Chief Charlie Beck said at a news conference.
I wrote about this back in 2007, where I called it CYA security: given the choice between overreacting to a threat and wasting everyone’s time, and underreacting and potentially losing your job, it’s easy to overreact.
EDITED TO ADD (12/17): Best part of the story: the e-mailer’s address was firstname.lastname@example.org.