It doesn’t take much effort to verify and cross reference check in most of the scenarios. But I have no idea how they will fight against LLM-optimized SEO-hell. Like I could see products flat out flying in the ads, hoping for LLMs to pick that up and suggest to users. Source of truth will matter even more.
How many times has that happened? Those cases make the headlines, but it’s so rare that, in my opinion, they can be disregarded. Nothing is perfect, just assess your risks and tolerance to error. That’s subjective, so one acts accordingly.