A couple of my favorite examples of people who go so deep into a subject that they can't help but be changed a little after the fact. Don't try this at home... unless you want to.
Adam Savage gets obsessive and creative about dodos and the Maltese Falcon.
Anthony Watts of Watts up With That? meticulously disects Al Gore's Climate 101 "simple experiment." He also incorporates contributions from his readers. All in all he makes a pretty strong argument that Gore's "simple experiment" was nothing of the sort.