anti-competitive how? MegaUpload might be competing for 'hearts and minds' with their campaign, but I hardly think that it's possible to have a legally recognized monopoly on them.
You don't need to have a monopoly to be anti-competetive. Having the power to take down content that doesn't belong to you, on the worlds largest video sharing site because you disapprove of it - does constitute anti-competetive behavior on UMGs part.
