Regarding drunk passengers, is it only the disruptive passengers we worry about? What about the ones who become mentally impaired, fall asleep, and would cause chaos in case of an Emergency or an Emergency evacuation?
This is a much broader issue than just handling passengers who become disruptive and violent when drinking, it's regarding safe operations.
I always believed the main job of the CC was to ensure safe operations in case of an emergency, serving drinks and meals and selling lottery tickets a secondary part of the job. The disruptive passengers are easy to spot, the ones who will make an emergency situation chaos, might not be so easy to spot, as they probably have fallen asleep during the early cruise.