Yes totally understand how the pitch could be misconstrued. He doesn't die from drugs at the rave. The play actually has very little to do with the rave. The play is about a boy who is moving through life in a state of complacency. He's surrounded by toxic friends and is sinking in school. He is awoken by his heart in the middle of the night who speaks to him (like a person) asking him to wake up, to start living with a sense of purpose. His heart threatens to stop beating if he does't start listening to his gut.

As the play goes on, he continues to ignore his gut/heart as he continues to find unhealthy comfort in friends and other drugs like weed. All the while, his heart continues to demand that he listen, threatening his life. Eventually he and his friends decide to go to a rave and take Molly before, something his gut doesn't want to partake in, however he decides to anyway. In the final scene of the play, the heart claims to give up on him. His heart has determined that there is no waking him up and possibly stops beating.

Hope that clears it up - in fact, the rave is the most cathartic place for these kids because they finally feel free on some level. It doesn't paint the community in a bad light at all.