Well I too could imagine some sorts of shenanigans that will mislead the majority of validators especially in PoS that doesn't lock any of validators computation resources. It's even worse in the sense that a validator can be anonymous and doesn't hold any legal responsibility (in contrast with WebMoney). Thousands of validators could be one entity now or in future and you'll never know that (in contrast with PoW). Some infuencer (just like Vitalik) can come and convince validators to mine incompatible fork of Ethereum - you can do this for free and won't be slashed on main chain - and why not, maybe this fork will prove better and people switch (yeah this can happen with any crypto that's not Bitcoin)?

All I'm saying that Satoshi really produced the one undeniable cryptocurrency. His idea is sound, you don't need any friends or websites, or "common" knowledge besides his simple idea of the most work burned chain. Anything other is really questionable.