@Marco13 I'll be blunt then: a lot of the people who use those phrasings/arguments outside of SE are transphobic folks. They're really classic arguments that you run into over and over again (speaking from experience). Just because someone uses them doesn't mean they're transphobic, but enough transphobic people have used them that they've become, as I said, a red flag. I don't know what to tell you as for #3 - maybe think through why you're making those arguments, and why you think they're legitimate? It's hard because it can hurt [e.g., why is grammar more important than someone's identity?]