"Heathers" is black satire in which we get to see those people we all loved to hate, the high school popular elite, systematically off'd by a beautiful but reluctant campus queen (Ryder) and her loner boyfriend (Slater). Having passed the test of time, "Heathers" offers a respectable cast and nominal production value, but it's the smart script loaded with cheap shots at campus social strata, teachers, and parents which is responsible for its success. An entertaining, eventful comedy watch for anyone who was ever snob snubbed in high school and is old enough for a soft R rating. (B)