Alternative Character Interpretation: Was Erin a good-natured young woman who, despite making mistakes, had the best intentions at heart and is a genuinely likeable person or was she an idiot that had to have things her way and got everyone in the movie killed?
The original script had her pregnant, which gave her motivation, but is that justification?
What an Idiot: Leatherface drops his chainsaw right in front of Erin. She sits on the ground screaming and doing nothing productive, leading to her friend's death. Way to go, moron.
The Woobie: Pepper. She's genuinely a nice, likeable person who only wanted to help the hitchhiker and found herself being unfairly punished for it.
Andy too. He may not be fond of helping the hitchhiker, but he's clearly very loyal and protective of his friends ( performing a Heroic Sacrifice to save Erin, even) and suffers the worst fate of the film, even worse than Morgan.