That blue light thing is pseudo-science. Bodily activity though, yup, that's a big one.
Conspiracy? One of the devs has a website where he literally openly denies the Uyghur genocide, Tiananmen square massacre, "Mao did nothing wrong", "Ukrainians are Nazis", denies every single critique of USSR and China, and a whole lot of other vile shit. Read for yourself: https://github.com/dessalines/essays/blob/master/socialism_faq.md#did-mao-kill-millions-of-people
This is the real test of the fediverse. Can software written by a piece of shit like that exist without being influenced by their garbage political views?
I think it's possible and I like Lemmy to thrive but it's important to keep an eye out for tankies and to not close your eyes to the reality of who started this.