I'm confused, my use of possessive pronouns is uncivil? I've read the guidelines, specifically the "In Comments" section. I'm failing to see where my comment runs afoul of the guidelines. It's not snark, its not something you wouldn't say face to face etc. Can you you elaborate?

Not the pronoun itself, of course, but when you use it to make negative insinuations about the person you're talking to, that's unduly personal and crosses into incivility. You did it twice above. Other examples in https://news.ycombinator.com/item?id=15472109. Please don't do this.