Globally disable comments? 10.4 Server/blojsom ANYONE?

I'm looking for a way to globally disable comments in blojsom, running on OS X Server v10.4. In a scenario where weblogs are activated, and OD users can create new blogs, I want comments to DEFAULT to off on newly created blogs. Disabling them once the blog has been created is easy, but I can't seem to find the trick to change the default for newly created blogs. Tried a few config file changes but so far no luck. Anyone know? Help would be much appreciated. Thanks.