Just having fun thinking about information bombs...
There's a widespread belief that we live in a lottery economy. A place where the outcomes from gambling determine your future -- where random luck and an ability to cheat skillfully (as in card sharking or loaded dice) is more important to your success than anything else (hard work, skill, intelligence, training, education, etc.). This shift in belief has even been embraced as social policy: nearly every US state now uses gambling as a means of boosting revenues, leading to a degenerative trends in spending.
Of course, this also means that people don't believe that people that win in gambling deserve their fortune. So much so, that when lottery players do sometimes win, they immediately generate a feeding frenzy of sleazy people that want to get their rightful share. A good example of this is the story of Abraham Shakespeare, a truckers assistant from Florida. Within three years of Abraham's winning a $30 m jackpot the money was gone and he is presumed dead. Or Stuart Donnelley, the Scotsman so scarred by the feeding frenzy generated by his winning that he became a recluse and recently took his own life.
Granted, these fellows were neither the most prepared people in the world, nor were they protected by a phalanx of lawyers and accountants (to the extent they can be trusted). But, even with that 'protection' taken into account, who is really prepared for the type of feeding frenzy they experienced given their visibility?
This leads me to think that the ultimate information age griefing attack (within gaming, this is an attack meant to disrupt the ability of the target to live within a gaming/fantasy world) in a lottery economy is to publish the names, social security numbers, phone numbers, addresses, banks account #s, memberships, e-mail addresses, etc. of people that have a net worth over say $5 million. Since this is merely information, a text file of this data wouldn't be impossible to accumulate (very tough, but not impossible to accumulate) and relatively easy to distribute. The result would be that anyone of a certain net worth would immediately be visible to the plethora of sharks that don't believe they deserve their wealth. My guess is that the frenzy would be pretty horrible to watch.