It's bad to use others for your own pleasure.
Heather knows everybody's gossip in school and is bored during lunch break.
Heather wants to no longer be bored.
Heather takes her mind off her classmates and opens a book to read for the rest of the lunch break.
Heather uses her knowledge to create some interesting drama among classmates, so she can watch what happens.
Heather enjoys the book and finds a potential new hobby in reading.
Classmates eventually realize Heather was the source of the rumors and turn on her.