I'd be one of those who would say that to you...Just don't go.
However, in all fairness, the adult comedy shows on Carnival ships are presented at midnight
, and they are well advertised in the Capers as being R-rated, 18 or older.
Obviously, many people like this type comedy. I don't happen to, so I just don't go to them. Doesn't mean I think they shouldn't be presented.
There are plenty of other shows to attend - although not at midnight. The only ones I attend are the production shows. I don't happen to care for magicians, jugglers, or comedians in general - but I wouldn't suggest that no one else attend. To each her/his own, y'know?