So the clones of Bitcoin that changed PoW with PoS (PeerCoin and derivates) are slowly reinventing…

So the clones of Bitcoin that changed PoW with PoS (PeerCoin and derivates) are slowly reinventing the “max rollback”, which was implemented in NXT 5 years ago. Slowly because it seems they are using it only for DoS protection (the currently discussed attack).

Idea for another attack on these networks:

A long-range attack enhanced with stake modifier grinding