Why did Cady think she'd be blamed for the whole Burn Book?
Regina said she didn't write the Burn Book, but says that Cady, Gretchen and Karen were the only girls in the entire school who wasn't in it.
So wouldn't the blame be between Cady, Gretchen and Karen? And not Cady only?
Why did the girls give Cady cold stares at the gym when really the blame should have been shared amongst all the Plastics?