In Wichita, serious damage from the storm caused Spirit AeroSystems Inc.

WSJ: Tornadoes Skip Across Nation's Midsection

There have been many security holes exploited in Web servers belonging to Yahoo Inc. that have caused far greater damage than our disclosure.

ENGADGET: Yahoo confirms server breach, over 400k accounts compromised

Rogue employees could do even more damage, says Clara Shih, the founder of Hearsay Social Inc.

WSJ: What's a Company's Biggest Security Risk? You.

However, the damage to the reputation, and stock price, of Pearson Education, Inc. could be far worse.

FORBES: No Educator Left Behind: Pearson, Leading Scorer of Standardized Tests, Subpoenaed

Sister's Gourmet Inc. says it shipped the box and automatically sends replacements if it learns of damage.

WSJ: How Would Santa Ship Chocolate Pears and Live Lobsters

Dimitri "didn't have to be a rocket scientist" to get into Microsoft's server using a known security bug, and theoretically he had the opportunity to do damage once achieving access, said Paul Zimski, a security researcher at Internet security firm Finjan Inc.

CNN: Microsoft servers hit by another hacker