This was their response:
We want to thank you for your concern and your added wisdom.
DNS Support Team
I sense much sarcasm in you... they could've just said thanks for the suggestion and left it at that. Added wisdom, sheesh.
I went out of my way to actually make it a polite and friendly email, too, so they wouldn't take offense. To be blunt, I bet I know more about sys admin work and dns than all of their support people put together. They're pretty good but most ISP's have, at best, mediocre people. *grumble*