Clothing is very subjective and there are as many tastes in clothes as there are number of people. What looks fine to someone might look gaudy to someone else. As long as the parts of the body which should be covered are, you won't be turned away. It's a slippery slope when people try to get by wearing cut off t-shirts with vulgar writing, very short hot pants, thong bikinis, bathrobes and a baseball cap worn backwards to boot.
Then there are those who dress formal in the most God-awful suits and dresses ever imaginable. There is something for everyone and it should be up to RCI to enforce its policies and not the passengers, IMHO. Personally, I like to people watch and have a good laugh at some of the sights but to complain? Never! It wasn't me. 😇