Just keep track. Their screen names are posted with their articles. How many articles does a person feel compelled to post in one day?
Why so Curious? You paranoid?
I just noticed this today. When ever something big gets posted - boom - all kinds of bogus, irrelevant stuff comes up to bury it.
Watch for it. You'll see it.
Not paranoid at all. I just get a little suspicious myself when someone decides their article is so important that other people should simply refrain from posting after them to keep it on top. If there are specific people who are doing this, name them and the rest of us can check it out.
Otherwise, I don’t think I’ll spend much time monitoring posting volume.