I don't believe the "I'm entitled to all messages discussing me because of the GDPR" is correct, though the UK GPDR may be different in a way I don't know about

I don't believe the "I'm entitled to all messages discussing me because of the GDPR" is correct, though the UK GPDR may be different in a way I don't know about. It's an interesting take (what is "data" anyway? does it include "the CEO thinks <person> is a dick" if that record is kept on company infrastructure?) but I don't think it'll hold up in court. If the author decides to press the ICO to take action, perhaps we may find out one day. That said, scraped data about you definitely falls under GDPR protections even if you never provided any data yourself.