Interesting way to look at it, Truckpony. How would an employee hope to have "their" problem addressed if "they" don't identify themselves.
"um yes, I am being harassed by my center manager. Could you help me with that?" What exactly would they say to the center manager? "Yes, apparently, you might be harassing one of the 50 drivers working for you, but we can't really say who it might be, clean it up, ok?"
You bet they would.
By the way, whoever told you that a corporate HR person came out to investigate is confused, misinformed, or simply lying.
The 800 number does not go to corporate, and the issues called into that line do not go to the corporate office. They are received by a third party, go to the region, and are immediately turned back over to the district that they come from, because....wait for it, that is the only place they can be corrected.
Happy holidays, everyone!