Possible Clues:

• Audience members who try to embarrass with gibes
• They object vocally to some stand-up characters producing heroin and ecstasy found in clerk's hash
• Comedy club razzers
• Trouble for comedians
• Unwelcome callers during a performance?
• Annoying attendees
• They badger the speaker
• Comic's banes
• Badgerers at meetings
• They don't believe in free speech