Good style, good heart, good soundtrack. This is a fun teenage rebel with a cause film, with a decent array of lovable and hateable characters. The narrative is freewheeling enough to keep you guessing about the outcome, and this lends itself nicely to the uncertainty felt by Billie Jean and her compatriots.
At the end of the day, I struggle to put my finger on what was missing, what's keeping me from giving it four stars. I quite enjoyed watching it, but I think the lack of significant consequences for any of the characters, good guys or bad, took some of the air out of its sails right at the end. The stakes seem quite high throughout, there's an attempted rape, a shooting, a prized scooter gets trashed, a cop is held at gunpoint. But in the end, nobody really gets what's coming to them, there's some mild public shaming and then everyone burns their memorabilia of the events, as if none of it ever happened. The movement Billie Jean inadvertently founded never develops and seems destined to fade away overnight. Ultimately, the creators just didn't have the guts to take this to a darker place, like Suburbia did a couple years before with similar themes.