Gang;
This is something that can be done mechanically by a series of scripts. If someone wants to do that and generate a list of entries to be deleted, we'd be quite a bit further along, I think. Does anyone see any flaws in this?
While there's never going to be a single turn-key solution to this, we should: 1) first backup the current DNS files 2) insure we ignore lines that may have a router alias instead of a callsign as it's hostname 3) try to send out mails to those registered in the portal that we're cleaning up DNS, and if they find they're not working anymore to contact their coordinator. We don't want to just cut off folks without warning that _we_ may make a mistake.
I cleaned all my zones up a while back (as you noticed). It was fairly seemless. I think there was only 1 guy I mistakenly dropped but was immediately right on it readding it.
#3 above though I think would be most important of the 3.