Apparently it is offensive for anyone who is not Latina to tweeze her eyebrows a lot.
According to a piece in Marie Claire, deciding to pluck your eyebrows so that they are very thin is “problematic” and “cultural appropriation.”

The author, Krystyna Chávez, explained that she was absolutely horrified when she saw a photo of Rihanna with skinny eyebrows.

“When I saw Rihanna on the cover of British Vogue this week with a set of ultra-skinny brows, my immediate reaction was, ‘Wait, WTF?’” Chávez writes in a piece titled “I’m Latina, and I Find Rihanna’s Skinny Brows Problematic.” “Why is Rihanna wearing chola brows?”

“Considering it was highly unlikely that Rihanna had suddenly joined a gang, and seeing as the Caribbean singer wasn’t exactly raised on the streets of East L.A., my Mexican-American heart was deeply confused, and deeply annoyed,” Chávez continued.