As a black person this sort of thing does occasionally piss me off. But tbh to the extent on how pissed off it makes me feel is based on how I've been treated recently by the "white" world. I'll try explain.
For example, I wear my hair in braids occasionally as its a protective style. We wear it to protect our hair from breakage. Our hair is naturally dry and prone to breakage from daily styling this gives our hair and ourselves a much needed break from doing and time for it to grow. We can wear our hair in braids for upto 8weeks when taken care of in this way. And can be done as simple braids to a really intricate type of look.
The clothes I wear is reflected from my culture, my family are from the Caribbean and the weather, food, family and music is heavily mixed in to our daily lives to produce our culture.
These signifyers that I have as a black person such as
My skin colour
Braids or protective styles in general
Clothes, make up
Music
Slang/accents
Are who we are as people based on our bodily needs and our lived in culture.
When people take these signifyers and use them as a costume to play with however we'll intentioned, depending on how they do it, it does bother me. For example when you see say a white celebrity such as Ariana Grande wearing box braids or cornrows, dark foundation, hooped earrings giving the impression fairly obviously of a young urban black women. Then the next week she's ditched the look for her normal look when she's finished promoting something.
It's the double standard that I am not treated in the same way when I'm presenting in my natural self. Where as a white person "black fishing" gets to take the best of my heritage without the lived experience that comes with it. With none of the baggage that I have to endure.
They don't get followed round shops.
They don't get racist abuse.
They don't get the default that you are guilty until innocent.
They don't have people cross the street or people clutching their bags close to them when I approach.
Or people feeling they can touch me uninvited.
The thing is people take and use our features I naturally have, or have to do for myself such as wearing braids or my dark skin and use it as a trend for themselves without having to deal with what I have to.
I also don't understand why people choose not to see this either, we never seem to discuss people choosing to copy say Asian styles because it just doesn't seem to happen on the same scale.
But again how I feel about this really depends on my mood at the time.