I think it does matter, because a decentralised system would have much greater problems moderating content than Google does today. If this was coming from the B

I think it does matter, because a decentralised system would have much greater problems moderating content than Google does today. If this was coming from the Belarusian government bidding for ad time on thousands of peertube instances and the response was piecemeal requests to each federated instance's admin team, then it would also take a very long time to remove from the system as a whole. It might well be impossible to remove it from every popular instance.