I think it should be commended how the native peoples have managed to hold onto their ways through all this adversity.
In my view, there are 1000's of people who are uneducated about cultural appropriation and theft. They do not know paying is wrong, nor do they know the person who is claiming this or that is not this or that. Educating the population is not easy, and we don't have millions of dollars to pay for ads on TV that educated people of this problem.
So we have to educate in the way we have.. word of mouth, websites, maybe a few videos on YouTube. The more people who can speak out against the abuse and theft of cultures and abuse of their spirituality, the better.
The thieves have one up on the populations that seek them.. the populations have no idea what is right of this or that culture. So the thieves can say they are Lakota or Cherokee and the people wouldn't know one way or another. Especially when you have frauds teaching in supposed cultural centers or weekend shows of some sort.. I'm sure there are even pow wow's that are put together by frauds.. some frauds don't even know they're frauds..