It can be "stopped" with setting some meta tag attributes and values.
This should work:
<meta name="robots" content="noindex,nofollow" />
But, I really don't see a point in doing that. I would rather want to see this:
<meta name="revisit-after" content="1 days" />
It will make the google bot revisit the page everyday and keep it's database updated.
I doubt that your account will get removed, so you can just modify the posts you really don't want to be visible anymore. Pretty simple.