How vulnerable are LLMs to astroturfing?

I’ve noticed recently that when I google something, Gemini will come up with a fairly easy to digest little blurb on whatever topic I’m googling. It seemed useful at first, until you google anything divisive. Then it will pull up a similarly easy-reading result, that on the surface sounds like fact, but when you dive into the sources you end up seeing random Reddit comments and websites. I’m fairly media literate so I was able to figure this out pretty quickly but I’m worried about implications for the broader population. It seems like smooth answers hide not-so-great sources.