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UN warns against implanting AI chips in your brain because it could threaten your mental privacy
(www.businessinsider.com)
This is a most excellent place for technology news and articles.
Always use adblock, dns filter and malware scanners. Also check your privacy settings regularly and inspect network traffic to your "Smart Brain" (I just invented the term).
I imagine scenarios where you can't get rid of annoying advertisements everywhere, even in your dreams. Or people being remote controlled. Or their bank accounts emptied.
However, this currently is just science fiction.