This whole issue is becoming terribly sad. One activist is trying to stop a major chain from selling dream catchers. It is wrong on so many levels that it has become pathetic. 
The indigenous population is shooting itself in the foot. At some point people will just stop buying indigenous art. Who is going to spend money on jewelry if they can't wear it? Who is going to buy indigenous paintings if they are bullied for displaying it in their home? 
I can see the argument for buying genuine indigenous art rather than fakes. This is an issue that every creative artist, community or company faces, and I could accept a process  to identify and certify articles as "genuine" indigenous artifacts, but the whole "cultural appropriation" argument - that no-one can borrow from any other culture - is stupidly childish. It will produce a backlash that will do the community no good whatever.