To me this seems like people looking to create a problem, rather than addressing an existing problem.
A example could be in music, where there is now an influx of white soul singers and hip hop artists. Who are often more famous than their black counterparts.
No-one can tell people in society they can only enjoy black people singing white/ soul music. Why can't white artists of these genres be equally respected? (Genuine question.) I know that historically these genres of music were started by black people, but are we to then start issuing boundaries around black/ white classical musicians? What about the arts, acting etc? Only white people in Shakespeare please! I know it's often used to reference minorities but in today's multicultural society, if we are going to actually attempt to make a go of multiculturalism, it must work both ways or resentment (and lunacy) will breed.
Hairstyles - recently Kim Kardashian wore cornrows, and was credited alongside a number of other white celebrities for bringing this hairstyle into the mainstream, when it has for centuries been a well used and practical hairstyle for those with Afro hair.
Nowhere has anyone claimed, ever, that KK is to credited for cornrows. Yes, she sets trends, and this is one of many examples of that. Also, she is of mixed heritage.
I think that people attempting to be too racially sensitive often has the opposite than desired effect, causing more segregation and harm than good. A society where we all influence each other as human beings would be preferable to: "No you can't wear a sari because you're not the right colour", surely?