Why not filter the word "kitchen"? It isn't commonly used is it?
I'm not sure how they "Filter" Posts, but handling
it in the way one sets up an e-mail filter sounds
plausible, especially, as you seem to be suggesting,
as long as the Regular Members are made aware
of the Filtered Words so they can restructure their
posts to read as per your example:"The Room In Which I Cook" instead of "KITCHEN".
that would be a banned word (at least temporarily).