Have you heard this story? 

A black female student confronted a white male student who had his hair in dreadlocks, claiming he had "no right" to wear his hair that way because he was "appropriating her culture."

Leaving aside for a moment any puzzlement as to just why a white student would want to wear his hair in dreadlocks (maybe he's a practicing Rastafarian?), it would seem that he certainly has every right to wear his hair any damn way he chooses, and it's nobody's business but his own.  And I seriously doubt that any white person has ever looked at a black person with "processed," "conked," "Jheri-curled," or otherwise straightened hair and raised a ruckus that the black person was "appropriating white culture."

I’m thinking back to circa 1967, when I was a hippie, with hair down to my shoulders (I remember being told by a prospective employer, "You have the right to wear your hair as long as you like.  You also have the right to be unemployed.")

But there was more to being a hippie than just the tonsorial aspect.  There were distinct sartorial and other aspects as well.  And had there been this kind of "awareness" of "cultural appropriation" (which few dare call "hypersensitivity" or "a manufactured grievance") back then, just think: I might have been excoriated by Hindus for wearing my Nehru jacket; I might have been hassled by sailors for wearing my bell-bottoms.  And, if I'd seen a fellow with short hair wearing a tie-dyed T-shirt and "tripping" on LSD, I could have accused him of appropriating my culture!