“Quis custodiet ipsos custodes?” is the important question posed by the Roman poet Juvenal, translated by the English author Alan Moore as “Who watches the watchmen?”.
But it is perhaps a question with a complacent implicit assumption. It presupposes that it is possible to watch the watchmen — and all that one needs to do is work out how this is done and by whom.
Regulation, however, is not magic. Just because one wants a thing to be regulated, that does not make it capable of actually being regulated. If a thing is unpleasant or unwelcome, the instant demand is that something should be done, and that the unwanted thing can be regulated so it cannot happen.