Embarrass

Definition:  Any attack that gives makes the other person look like an idiot.  Generally this means you change his web site for him.

Difficulty Rating:  If you can do this, you can probably also steal any data they have on that site.

Why: Any number of reasons.

  1. Politcal reasons (Chinese human rights)
  2. Free someone from jail (New York Times)
  3. You're testing your technical abilities.
  4. You're a rude jerk.