Watch a Black Student Assault White Teen Because His Dreadlocks Are Cultural Appropriation.

No person or group is entitled to own a hair style or any other cultural practice.

Imitating practices that in some other group have a meaning you don't understand can in some cases be insensitive, and doing so might make you look foolish -- but that doesn't entitle them to stop you. And some practices, such as your hair style, don't have any meaning unless you say they do.