When I was graduating high school not long before you, it was still socially acceptable to use gay slurs. The social change happened fast, and not evenly in all places. Society needs to have some grace of we aren't too have a huge group of people bitter about being punished for breaking a new social rule. Besides that, we have a tendency to oversimplify and assume every race-related thing is racism, so I don't trust or society to police speech.