I’m not talking about giving up copyright to content. CC-0 means waiving any as much rights as possible legally, which depends on jurisdiction.

and impossible in others (like mine, Switzerland)

I couldn’t find anything about default license of publicly available material in your country, nor about the impossibility you mentioned by basic web search. I’m genuinely interested to read about it so do share sources if you can.

Btw there is a FEP and some discussions that talks exactly about the issue you mentioned in the root post.

Edit: formatting.

Whatever you put on public domain without explicit license, it becomes CC-0 equivalent. So while it feels violating, it’s perfectly fine. The best opsec should be separating your digital identities and also your physical life if you don’t want it to be aggregated in the same way. These technologies (scraping) have been around for a while and along with llm’s will stay for quite sometime in future, there’s no way around them.

PS: you, here, is generic you, not referring to OP.