I think it's fine myself in general. The human race is multi-cultural, we will always exchange goods, ideas, recipes, and yes even beauty or fashion styling. I think it's quite natural actually. However, catering to someone's race as a way to exploit them is not favorable, as in Hillary Clinton saying she eats hot sauce on everything or whatever she said to all the latino community...that was just pandering votes but all politicians do that in some form or fashion. Also not okay is Spanky from The Little Rascals dressed in blackface declaring how much he liked watermelons to try and act like Buckwheat. But, I don't altogether have a problem with blackface, that skit and others like it were indicative of the time in that racism was rife in the world and largely accepted. Glad we have progressed (in a good way) since then.
"Cultural Appropriation" to me is just another word to victimize people and thus control them, so I don't care for the term or the way it's used these days. But, the practice of it I think is fine if done respectfully or innocently. As in, a non-asian kid that wants to be a ninja for Halloween...I mean come on, that's innocent. And fun. And cute.