alt Hacker NewsOthers being moved to the point of also leaving would only worsen the effect. A viral post too can worsen the effect as it's now even less likely that someone with scruples who qualifies for the position(s) will apply. And those in it primarily for the money - and couldn't care less about the morals - will happily send in their CVs after becoming aware of the post.
I'm utterly unconvinced. Others who are moved don't have to leave to effect change. And there's a very small pool of people on the planet who are at least as qualified as Jacob to work on pretraining at Anthropic. And when they'll join they'll have to ramp up. And you haven't addressed any of the positive effects of virality.