I really don't think it's ever appropriate to reveal Deadnames. It can expose someone to danger and at the very least people drop those names for a reasons. Trolls will use that name against them, constantly, just as they misgender trans women to get at them. People like this will often claim not to be transphobic, but will go out of their way to use information or methods of attack available to them only because the person they're targeting is trans.
Again, people who may have started out of simply bitching about SJWs turn out to be old school transphobes and in certain communities that doesn't seem to be questioned.
Deadnaming someone is uncool, regardless of who they are. As is the "lowcow" phenomenon's disproportionate focus on trans women and society's vulnerable in general. People like Rani and Chloe are pretty easy targets guys, and they have dealt with more bullshit than most of you ever will. I find a lot of the time these threads involve some sheltered individuals targeting very marginalised people, and telling anyone that disagrees to ironically grow a thicker skin.