agree with redman - but also fear pehaps?
they are bombarded with messages about being cool etc all the time - often the 'moral' of the story in films and TV, while purporting to be positive, often just singles out the people who are being 'themselves' or are bit different for ridicule - such as the nerds, the goths, the emos, and the gingers, the fat kids, the one wearig glasses etc etc - so if you are not a perfect jock or a sorority girl you are a loser
films such as shallow hal appear at first to be saying beauty is only skin deep and it doesnt matter what you look like as its whats inside that counts - great message - but it then just goes on to show this 'message' by showing that fat girls are comedic, miserable, and no guy will even look at them in the first place, unless he believes shes thin... very mixes messages there...
this creates feelings of inadequacy etc people simply feel safer in their own little world...
also many adults have no time for the anxieties kids face -
we see their dramas and problems as silly and stupid and ignore them - because in the 'real' world, they are unimportant - we know that - but they dont!
we know that in 10 years those things wont matter - but to them they are very real and the most important thing in the world!
they are very real feelings, and emotions, the angst and pain is real - but we cannot expect them to feel like adults, because they are not adults, and all they know is thier world - so they are patronised, belittled and ignored... told not to be so silly and grow up etc
plenty of posts on here of people laughing and sneering at their kids dramas, and acting like they are idiots...it is meant with love i know, but all the kids get from it is that you dont undertsand them and dont care...
and again this creates negative feelings and some retreat into their own world.
having said that some also just like their own company, they like to do other things on their own - there is nothing wrong with that... assuming they are happy with it.