Due to the wonderfully diverse and cultural aspects of magickal practice, this is a topic that tends to come up often. It is a great thing to explore and discuss- thank you for bringing it up, @cbd! 
@praecog29 kindly shared the links to similar past discussions along with his thoughtful personal reflection- adding to that, I’ll also add a link to the discussion Good things, Bad things where I shared my personal thoughts on cultural appropriation.
When it comes to cultural appropriation, it is natural that everyone draws on their own personal experience. Each situation will have different perspectives and different levels of right/wrong to be considered- it is very hard (if not impossible) to make blanket statements of what is okay/not okay for different groups of people to do.
Despite the complexity of the issue, I will draw on my experience as a Global Studies major and world traveler and try to sum up my own personal feelings on cultural appropriation in 3 basic bullet points:
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There are undeniable benefits in learning about other cultures, languages, and peoples.
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However, studying and interacting with other cultures should always be done mindfully and respectfully.
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Taking things from another culture to ridicule/disrespect or for purely monetary profit is WRONG.
As my major in college, this is a topic of fascination for me! It is always a pleasure to openly discuss such important issues in a respectful and supportive environment like the Spells8 coven 
And as with any very complex and multi-faceted issue, I warmly encourage everyone to do lots of research and form their own opinions around the subject.
Thanks again to cbd for opening the discussion!
Blessed be 