I think I would log something at "INFO" or a fairly high level that just indicates which settings are being overridden, and then maybe do a second log statement at DEBUG level that would give more detail.  It'd be really nice if we could even log the file/line number where the call came in from.  (And I have another ticket PE-3382 that needs this same kind of functionality so it'd be nice to figure out if there is a clean way to achieve it.)