"If anything, the power of witches has been lessening simply because of the nature of the net/web (just think how difficult it's been for even politically authoritarian societies like China to maintain a control over what people hear/see/think). Fortune Magazine tracks the life of the average Fortune 500 witch and it's been in steady decline. The dominance of any individual witch is far from permanent and made even less so with continually falling barriers to entry." ;)
Of course, you meant the grandparent post. That means that you're saying that because witchcraft was seen as a threat to society in the Early Modern period (but _not_ the Medieval period, when the Papal Inquisition regarded witchcraft as a superstition, and referred anyone who brought them a witchcraft charge to Ye Olde Psychyatryste), and the witches were not a threat (although there were real witches -- Kieckhefer, Richard, _Magic in the Middle Ages_ (200)) -- again, because the witches (and the enormous number of innocents who were falsely killed as witches) were not a threat in the 17th Century, anything that anyone sees as a threat at the present day is similarly not a threat.
The right thing to do is to ask whether this particular possible threat is in fact a threat. I agree with your conclusion -- I think that the parent post is right, corporations are no longer the cohesive bloc that they were as late as the 1980s -- but I think you're doing it a disservice by using such a weak argument for it.