Rappers are all criminals.
We're going to (for the moment) ignore the obvious racist overtones of this statement. We're also going to ignore the blatant profiling of rappers by law enforcement (remember the NYPD's tax-dollar-wasting hip-hop task force?) which no doubt helps land a disproportionate number of rappers in hot water. (Most often for drug possession, like any other musician.)
Instead let's ask the ghost of Nancy Spungen, stabbed to death (presumably) by her boyfriend Sid Vicious of the Sex Pistols, about the criminal tendencies of rock-n-rollers. Or we can go pay a prison visit to Charles Manson, who moonlighted as a hippie singer-songwriter and lived and recorded with members of the Beach Boys when he wasn't out, you know, murdering people and painting the walls in their blood.