Sometimes it's just not worth it. It's nice to be able to workshop your thoughts, and then you've work shopped it so much that it's just not worth posting - the user you're responding to probably won't care or will antagonize, sometimes your thoughts change as you're typing them, sometimes it just doesn't make sense and there's no point in re-writing something that ultimately contributes very little to anything except your own self-expression.

But this is the internet

"It is better to remain silent at the risk of being thought a fool, than to talk and remove all doubt of it." ~ Maurice Switzer