From the comments at Chronicle:
Some black and feminist activists have been engaging in these deceptive tactics for years. And when they are revealed as hoaxes, the standard line is, “It doesn’t matter that it didn’t happen, because the prejudice (racism, sexism) is still there.” Is it any wonder that some flaky conservative kid will try the same thing? (Ergum Soloff)
A better approach to dealing with such cases came from Ryan Anderson at firstthings.com.