That’s low time preference for ya.

Funny how they complain as soon as the content doesn’t favor random killings and fake social engineering.

There will always be an incentive for Sybil attacks, spam is just the lowest rung on the ladder. More sophisticated attacks, for example by bootstrapping a sybil in-group via social engineering in order to effectively hijack identity or phish people will be worth the cost of PoW since they might be able to manipulate public information or gain access to trusted information.