Well, the discussion isn't really "peer pressure: does it and will it exist?" The discussion is really "how to stop the currently unprecedented harmful effects of peer pressure." Surely, "peer pressure" can't be stopped, in either its good effects (negotiating the passing of environmentally beneficial legislation) or in its bad effects (Prince Harry turning to drinking with the lads when a teen). Yet just as surely, adults (parents, legislators, education professionals, religious leaders) must step in and decry the contemporary effects of peer pressure gone disastrously awry! Beatings, hangings, ostracism, shooting--all most likely displayed on YouTube or tauted on FaceBook. These effects of peer pressure must not be embroiled in the complacency of "well, peer pressure always was and always will be." Surely the current high-tech levels of peer pressure gone awry require attention and action.
The first step (and I do not have the knowledge to see past the first step) is to decry the current outrages of peer pressure and to demand safety for our children and youths; to demand the respect of human dignity among our children and youths; to demand outrages be curtailed, even if it means well thought out restrictions on people of certain youthful ages (yes, yes, I know--can't legislate morality; and the free market economy--yes, yes--yet slavery would have gone on much longer if Lncoln's generation had not acted in several countries to legislate morality; and the free market economy has lost a significant lot of clout recently, hasn't it?). One thing that has been done successfully in the past, e.g., MAD and Abolition, is the formation of grassroots protest movements to awaken concsiousness, enliven outrage, and chart a path of corrective action. Worldwide protest, as it is a worldwide problem, has the potential to awaken a path of corrective action and enliven a way to reign-in peer pressure gone wild.