I have heard from others who are in favor of a list focused on teaching. I can see the value in having two lists or narrowing the focus.
I am unfortunately setting the constraints very high in terms of Math Forum staff time. Successful solutions will have to involve equal or less time than deleting subscribers who violate group standards.
I imagine your solution involves more than that in order to determine which discussion a post should go in, moving it to another discussion, and also handling abuse. This is complicated by the fact that some participate via a mailing list, rather than through our web-based discussion software.
I don't want to bother the list with procedural or technical discussions so feel free to continue to discuss the details with me in private and I will summarize as needed.