Yeah, about that...it's now real. I don't have the source but I remember seeing either Sony or Microsoft actually having filed a patent doing this very thing: reciting an advertising phrase (or doing some mocapped thing) in order to continue using the platform.
During a lecture on clickwrap contracts the prof asked for ideas for making customers actually read contracts. Having them type out the contract was considered too far, but having them READ ALOUD key parts was deemed acceptable by the class.
If the parts they have to read out loud would be the important parts, than that might be a real improvement over the status quo, as it would made people more aware of what shitty things they are usually agreeing to.