I don't understand the issue with sharing culture. Why should culture be exclusive? I feel like people mis-direct anger at whites when they shame superficial differences like this, and that the notion is mainly rooted in arrogance and exclusion. There are plenty of valid reasons to shame whites I just don't think this is one of them. Appropriation may be indicative of ignorance in certain cases but I don't think people intentionally disrespect each other in this way. It's unfair and counter-productive to assume otherwise, or to claim that culture is exclusive. Generally speaking I think it's just shared enjoyment of certain styles, or even shared respect for culture.
On a personal note: I'm white and dreaded my hair last year. I don't think dreads are exclusive to POC. The only POC that ever commented on my dreads told me he liked them. I like them. There was zero consideration of race when I made the decision. I just like dreads. They look cool. This past summer I had a white person engage me and argue that my dreads are racist. They had zero evidence for this just vague notions. I told them I didn't agree. I'm not terribly concerned with this one encounter because it was a heated environment already and I don't know what they were experiencing emotionally. I was not in a good head-space for confrontation though and the experience has stuck with me. Especially because my partner is adamantly sympathetic to POC's in this regard.
I'm not here to argue, but I feel pretty strongly about this. I'd just like some other perspectives. Preferably from POC's. Thanks.