Thoughts on Cultural Appropriation?

Last week at San Francisco State, a non- African American kid was chastised for having dreadlocks He was accused of “cultural appropriation”.

But lots of people with curly hair have adopted dreads, including Anne Lamott and Newton Faulkner, . So my opinion was it was all a bit too much to get angry about people adopting a style that is Rastafarian.

But then Justin Bieber of all people showed up with dreads .

Where would you draw the line between appreciation and appropriation?