You have a lot of cautionary advice here which would be good for people to have awareness, but I have to say it comes across as very confrontational advice root

You have a lot of cautionary advice here which would be good for people to have awareness, but I have to say it comes across as very confrontational advice rooted in an us vs them culture that may be very much influenced by where you worked and what you went through. I'm sure these are all learned defense mechanisms but I'd beware of this way of living life. Sure you can hypothetically get in trouble later if you share your life issue with a colleague and somehow this would bite you later, but you also may have a lifelong friend or simply a friendly face to talk to. Your advice reads as a guide on "How to make sure your feelings never get hurt from work" whereas you can optimize for somewhere more in the middle where you allow yourself more freedom and happiness by increasing the risk of some potential but less likely bad outcomes.