This is related to grounding in search results. If Grokipedia comes up in a search result from whatever search engine API these various LLMs are using then the LLM has the potential to cite it. That can be detected at least.

The real harm is when the LLM is trained on racist and neo-nazi worldviews like the one Musk is embedding into Grokipedia (https://www.theguardian.com/technology/2025/nov/17/grokipedi...).

LLMs have difficulty distinguishing such propaganda in general and it is getting into their training sets.

https://www.americansecurityproject.org/evidence-of-ccp-cens...

https://americansunlight.substack.com/p/bad-actors-are-groom...