She is entitled to quit online dating. But her expectation that people should appreciate her for "who" she is, not "what" she is, is probably unrealistic. People who meet her in person can still tell she is black. They either are or are not okay with that. Skipping the step where someone feels confortable stating upfront that the dealbreaking detail is her race may make her more comfortable, but it won't make de facto racists more likely to ask her out. It just helps them hide their racism and not admit so readily that they would interested, if only she were not black.