Since we have new hair styles, of course we should be able to change them post- character creation.
There are 2 ways of approaching this.
1) Barber stands that let players change their hair by themselves. viewtopic.php?f=48&t=52371
2) Barbers/other players can change your hair style.
You may think "Why not both?", well 1 would completely defeat the purpose of 2.
I'd like to see Barbers/ have other players cut my hair personally, because most people don't normally cut their own hair, AND it would help encourage a little bit more player interaction.