so that we aren't littered with agreement status comments everywhere

Actually, what I've done sometimes is I add the status to the end of my already posted comment. That way I'm not adding any 'comment noise' but if anyone reads the post in the future they can see what the outcome/latest state was.

I do that occasionally but sometimes feel a little self-important while doing so. (Along the lines of "who cares what I finally think?") But I rationalize that it would be helpful for someone following the thread, in the near or far future. I think it would generally be a good norm to have.