This is the lamest argument in the history of the internet, but since we're having it........
I've always considered rack rash to be the scrapes to the side of the unit from just putting it in the rack, out of the rack, whatever. I do agree with you on the point above, though.
Gotta disagree on this point. Why would the abrasions made by the screws be indicative of poor maintenance and a lack of gear compassion?