Wallace beskriver det i 1991 som; ”…even an intravenous user of cocaine would be impressed with the much more rapid and intense effects from the smoking route, using crack.” I artiklen ”Drug users’ perceptions of ‘controlled’ and ‘uncontrolled’ Use” beskriver Tom Decorte det som følgende: Fourteen (13.7% of the 102 who replied to this question) believed that uncontrolled users are unable to stop using (the binge pattern).