The etherium developers and community have made relatively clear that if someone were to attempt such a thing, the non-malicious members of the community would

The etherium developers and community have made relatively clear that if someone were to attempt such a thing, the non-malicious members of the community would just fork at the direction of the developers to a chain that is identical except that all of the etherium staked by the attacker is redistributed among the non-malicious verifying nodes, as it would be once the consensus process concluded that an attack was being carried out in a <51% attack scenario.