Greg did use it occasionally, if he was starting a new thread.
http://www.thechipboard.com/archives/archives.pl/bid/318/md/read/id/683894/sbj/i-m-a-proud-poppa-again-ncr/
http://www.thechipboard.com/archives/archives.pl/bid/319/md/read/id/812812/sbj/ncr-my-son-s-prom/

One of the problems (and I confess to sometime being guilty) is that people leave the subject unchanged and it doesnt reflect the subject content, so there is a use for NCR. Of course half the threads that developed into political ones didn't start as such. Some even started as chip threads.