I had a conversation the other day at a birthday party with my friend's neighbour from the building. The fellow is a semi-retired (FIRE) single guy. We started with a basic conversation but then he started talking about what he interested in and it became almost unintelligible. I kept having to ask him to explain what he was talking about but was increasingly unsuccessful as he continued. Sure enough though, he described that he spent significant time talking with "AIs" as he called them. He spends many hours a day chatting with ChatGPT, Grok and Gemini (and I think at least one other LLM). I couldn't help thinking "Dude, you have fucked up your brain." His insular behaviour and the feedback loop he has been getting from excessive interaction with LLMs has isolated him and I can't help but think that will only get worse for him. I am glad he was at the party and getting some interaction with humans. I expect that this type of "hikikomori" isolation will become even more common as LLMs continue to improve and become more pervasive. We are are likely to see this become a significant social problem in the next decade.