Maybe what we need is to convince Anu to let us have explicitly non-linguistic forums. We could have politics, religion, sports, drama, entertainment, books, whatever.

It wouldn't even require a software modification.
We could simply decide to hijack some moribund, little-used category of the main index (such as "Loanwords from German" or "AWAD in Schools"), and use it instead for the sort of forums Faldage suggests.