I think that many times, many of us have a post all typed up...then we reconsider how well it adds value to the conversation, and close the tab, thus not posting something of lower value, that we would normally be just fine posting elsewhere.

That act of self-censorship (or just plain quality control) is a big part of it, in my opinion.

I only actually post less than half of the time these days. I'd nuke this one too, but then I do want to make the point, so here goes.