I wonder what would happen if a loud and disorderly group of customers walked into a Tesco's supermarket ? Do you think that security/management would have a word with them to quieten down. What do you think would happen next if they ignored such warnings ? My guess is they would be asked to leave.
One of the difference's between Supermarkets and Airlines (and there are many) is that Airlines attract more news - period. Have you ever read in a newspaper 'TESCO'S THROW'S OUT DISORDERLY GROUP FROM SUPERMARKET' ? Doesn't have quite the same impact does it.
The Captain in question probably does on average 20 sectors a week - something like 1000 flights a year
The fact that this sort of thing only happens once in a blue moon proves quite simply that most passengers know how to behave and therefore do not need to be asked to leave the A/C.
Well done to the whole crew