 By analogy, hardcore punk is sometimes abbreviated to "hXc".While some straight edge groups are treated as a "gang" by law enforcement officials, a 2006 study found the vast majority of people who identify as straight edge are nonviolent.While the early Washington, D.C. hardcore punk scene is often praised for its commitment to positive social change, both the youth crew movement of the 1980s and the vegan movement of the 1990s have drawn criticism.