Yup, it's pretty incredible. People just love to post a comment about their Amazing Opinion About How Trans Women Aren't Really Women Because Of DNA. They just have to tell you about this amazing opinion. They can't help it.
Another really annoying thing is when pre-op trans women are called "traps", regardless of context. "Trap" means a very specific thing - it implies that the person is trying to deceive potential partners into thinking that they are biologically female. I'm sure that happens sometimes, but a lot of people on the internet seem to think that all pre-op trans women are "traps".