Hey , but I personaly think there is nothing wrong with quotes and quizzes. The quotes are cool and show how much people like the show and the quizzes help us know what to write and get to know each other a llittle bit which also helps people know what to post.
As for maturity I'm fifteen and laugh at some of the quotes, enjoy doing the quizzes, write fanfiction for a cartoon amied at 8 year olds, spend hours watching Disney movies, Cott, Greys Anatomy and reading Shakespear...quite frankly i think its not maturity just more of an understanding that the people on this site are not profesional writes (for the most part) and are just fans who also write sometimes (also for the most part.)