Cultural appropriation is was explained to me as when an oppressive race takes on aspects of a culture it oppresses or has oppressed without understanding the whole culture. Sort of cherry picking the good and fun parts without doing something about the oppression. When someone from an oppressed culture takes on aspects of their oppressors it's assimilation and a survival tool, that's why it's acceptable for an African American girl to be Elsa (Assimilation), but not a Caucasian girl to be Tiana (Appropriation). I personally distinguish the intent behind a costume. Tiana and Elsa are made up characters so I don't really find anything wrong with anyone of any race dressing as those characters. I think where a line is crossed is when you do face or body paint, but just wearing Tiana's dress is just wearing a green dress. I'd have a whole different feeling if a Caucasian person dressed as a slave from the antebellum south for Halloween whether they painted their face or not as that is someone from a race that oppressed another and is , in a sense , mocking a dark time in our history, and yet, if an African American wanted to play a Southern Belle from the Antebellum south it wouldn't bother me because I see it as assimilation to fit into an oppressive culture. Right or wrong these are my feelings I don't claim to always be logical and reserve the right to change them at any time.