Answers
Shutting down a company's systems for a day
Demanding payment to stop an attack
Making money directly from the victim
Making a firm's normal processes grind to a halt
Taking bank details to spend a victim's money
Taking usernames and passwords
Treating hacking as a puzzle to solve
Copying millions of usernames and addresses
Demanding a ransom to unlock files
Breaking in just to see if they can
Getting revenge on an ex-employer
Getting back at someone after an argument
Taking a company's online services offline
Stopping an online shop's website from working
Targeting one particular person they dislike
Taking a database of dates of birth
eBay user accounts taken in 2014
Showing off skills to friends online
Proving they are clever enough to get in
Embarrassing a rival by hacking their account