Well this bit is unwritten and I've never discussed this before but I'm happy to do so as I believe that as a moderator I should always be open to questions.
My take on things is that the DVDFab forum is for the discussion of DVDFab and associated programs, likewise for the various other software specific forums.
So if you're using software in conjunction with the specific program then that's fine.
These software specific forums are provided for people that have chosen to use (and in many instances have bought) that particular program so what we're trying to avoid are endless 'You've chosen the wrong program, you should be using this one' type of interruptions.
There are always grey areas and we'll deal with these as appropriate but I'd like to think it shouldn't be too much of a hindrance to the members to have a thread moved as all we're doing is moving the discussion to the appropriate place (where possible) and not preventing it.