Trying to change people is fruitless; telling anyone that the way they look is inappropriate or not fitting, that they don't set a good example. We are all different and unique, allowing us all to express ourselves in different ways.
Everyone has a right to freedom of speech and expression; they aren't rebelling, they aren't trying to hurt you, they are simply showing the world a part of who they are...
Here is a small collection of deviations throughout dA that I thought expressed this notion well.
X by Pixel-Dream:thumb84728487:in a bathtub fully dressed by itslikefireMe 1 by genislav:thumb89870411:Enjoy pain III by hallamainenCleavage. by deterministka:thumb89260742::thumb66824546::thumb60468109:Tattoos by DerekDufresnefrom the down by MaliceMindSoul Ties Never Break by GypsyQuixotic:thumb58602878:Double Touble by Deborah-Valentineblue jeans by Searcher78Untitled27. by rockytatuador:thumb62733510::thumb65710122::thumb74737702:DNA Strand corset 32 piercings by mizuzinkaholikCorset piercing 35 by Kastrosama: