> It absolutely does work. A little bit, at first, when you have broad consensus backing you - but it does work. People will begrudgingly change their behavior for relatively minor things, and the change in the use rate of racial epithets in public reflects that.

The only change is that you now have a bunch of people who are afraid to use a handful of naughty words in public because they might lose their job over it. You haven't changed any minds or hearts, you've just moved the conversations into private rooms. You can't end racism by just shaming people for using the n-word. It's arguably just as bad now as it was during the Civil Rights era, but you can't easily see it anymore because it's mostly kept within "friendly" company.