I found the distinction between appropriation and diffusion made by WysiwyG a bit hard to grasp. Using a song or a style of performing without giving any credit or explanation, I understand is something to criticise. But copying hair styles, even when they may have symbolic meanings originally, strikes me as very much cultural diffusion.

And you can't stop it, even when it's insensitive. Catholics Rosary Beads, Muslim prayer mats, Jewish prayer shawls, Hindu forehead marking, all religious items which turn up being used by people who have no idea of what they might mean. Can't be stopped, short of bringing in the likes of the Taliban.