Using “who” instead of “that”

Here’s a New York Times piece from op-ed writer Frank Bruni, explaining how he likes to use “who” or “whom” instead of “that” to refer to people in his writing. I agree with Frank that it should be “the man who bumped into me” rather than “the man that bumped into me.” When editing the writing of others, I regularly make this change. It’s the humanitarian thing to do.