The member who is leaving prefers paper over plastic (That eliminates 1)
The member who is leaving does not have a signature hairdo, above the waist that is. (That eliminates 3)
The member who is leaving has used Hank's megaphone numerous times as a urinal (eliminates no one)
The member who is leaving routinely uses his member in conjunction with that of his band mates' members' on unsuspecting groupies (again, eliminates no one)