If you check the posts toward the end of the discussion I linked to, it seems we are honing in on a solution of running a special tracking server (which you'd re-point your DNS to) that is able to ignore the bad clicks.
Thanks, Sanford!
I have also experienced the behavior Sandy described. In fact, I sent a bunch of test emails from MSI to dummy hotmail and outlook accounts I created and never clicked or opened the emails yet it recorded a click in the MSI tab in SFDC.