As the first white rap group of any importance, the Beastie Boys received the scorn of critics and strident hip-hop musicians, both of whom accused them of cultural pirating, especially since they began as a hardcore punk group in 1981. But the Beasties weren't pirating -- instead, they treated rap as part of a post-punk musical underground, where the D.I.Y. aesthetics of hip-hop and punk weren't that far apart. Of course, the exaggerated b-boy and frat-boy parodies of their unexpected hit debut album, Licensed to Ill, didn't help their cause. For much of the mid-'80s, the Bea...