Noether’s Theorem:
https://en.wikipedia.org/wiki/Noether%27s_theorem
https://math.ucr.edu/home/baez/noether.html
Fundamentally, it allows us to logically infer the conservation laws from the laws of motion of a given physical system using relatively simple math. It always applies, no matter if we’re talking about massive systems or quantum ones.
Red Hat can’t go closed source since the source they’re distributing is released under the GPL. They’re required to distribute code to anyone they distribute binaries to, and they can’t stop anyone who has their code from redistributing it.
If you don’t want your info scraped, don’t put it online. Companies don’t even need accounts to scrape data, since Lemmy is fundamentally public.
There’s plenty of Nazis in the Fediverse, just not on any instances your instances are federated with.