full article here
Fluffi Bunni embarrassed leading Internet security organizations by breaking into their own computers and replacing Web pages with a message that "Fluffi Bunni ownz you" and a digital photograph of a pink rabbit at a keyboard. The attacks, which began in June 2000, lasted about 18 months, then stopped mysteriously and created one of the Internet's most significant hacker whodunits in years
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The guy was playing a game of `gotcha.' He wanted to prove that even firms that specialize in security can be hacked," said Mark Rasch, chief security counsel for Solutionary Inc. and a former Justice Department cybercrime prosecutor. "It's like someone who robs banks to prove that banks can be robbed.
I don't think these guys dammaged anything, but FBI did not appriciate their humor ....