The things I see every cruise in the Buffet amazes me. There is never a lack of rudeness, entertainment, or discussing behavior.
As for some cruises being full of rude folks more than others I can see this in a way where I live in Florida. You have folks from all over the country cramming in the state with different behaviors you are not used too. Loud rude folks, arrogant folks, the aggressive way they drive there cars.
My favorite is when one of these folks will say this is horrible where I am from its much better. I always smile and say I think you should move back it will not get any better here.
I love the folks in the dentist or dr office who pull out there out of state expired ID from there Louie Vuitton bag wearing there Lou Lou Lemon outfit and explain why they don't have the $50 co pay in cash or credit card.
so many examples every day.