If you think the dialogue is 'unrealistic' you're a moron.
Not because the dialogue IS realistic, it's not. The reason you're a moron is because the dialogue is not SUPPOSED to be realistic. This isn't supposed to be an accurate dissection of teenage life. It's a hard boiled film noir, complete with dialogue, transposed onto a suburban California high school.
"Unless Alpert's covered in bacon grease, I don't think Hugo can track anything."