Bill Gates is clearly the most dangerous take a look at the competition...

• Sauron: defeated by the Middle Earth version of a geeky kid- a hungry halfling with hairy feet.
• Darth Vader: defeated by a geeky kid with light sword.
• Lord Voldemort: defeated by a geeky kid with a broom.
• Agent Smith: defeated by a geeky kid with a leather jacket.
• Map in void context: resolved in recent Perl versions, so defeated by a geeky kid this time with a computer.

Bill Gates on the other hand, *is* a geeky kid. :)