> It takes considerable effort to slant a wikipedia page since many of them are protected to edits by new accounts so you'd have to build a reputation first. Then, you may need to convince other editors on the talk page about why your particular slant is better than the existing one, and finally, you have to do this on a page by page basis.

This regularly happens. Even beyond personal ideological bias (of which there is much), there are entire companies that you can pay to affect your technical/political/commercial slant on pages, in addition to teams in the major political parties that do this in-house

I know that LLMs are unreliable and that a clever system prompt can instill bias. But there are mitigations - namely, either doing your own inference (either locally or through a GPU-as-a-service), by sampling from multiple providers, or by crafting your questions in ways that avoid triggering that bias. And, so far, LLMs have proven to be far less slanted than some of the tech+political Wikipedia pages I've read.