The comment disabling is planned: http://bugs.dwscoalition.org/show_bug.cgi?id=471

And in a nice, automatic way, so that feeds that indicate commenting is available on the originating site will automatically display in DW with comments disabled.

I guess my REAL issue, though, is with LJ, since no matter how awesome DW is, feeds on LJ allow comments and I am sick of fighting for change over there, having never once had a good experience with the suggestions process.