This is a very good point. By design, we don’t know who owns what Safecoin or indeed what data.
While you could attempt to fork the network, there are limits of what can usefully be achieved by doing it. Unless you manage to convince everyone to completely abandon the old network and everything on it.
Tbh, if safe net got to the point where the above was required, it would probably be better to just create a new network and try to persuade people to use it instead. It would save the splits and acrimony.