[atweiden]

> PoS is easier than PoW to defend against a 51% attack as the offending validator set can be targeted.

Who decides which validators are malicious?

[iownzerobtc]

Depending on the type of attack, this defence is either part of the protocol, or can be coordinated by users in the network. Further reading here:

https://vitalik.ca/general/2020/11/06/pos2020.html

[atweiden]

> or can be coordinated by users in the network

Phone-a-friend consensus aka “weak subjectivity” doesn’t meaningfully differ from the administration of centralized Git repositories. If your blockchain requires human intervention to resolve disputes, as do all pure proof of stake implementations, you probably never needed a blockchain to begin with.