Unfortunately, while you’re citing lots of very valid cases of innocent people being victimized, I also think that the trail of information that follows people is very important for systems of justice.
Imagine criminals getting away with white collar crime, having changed their name to make it more difficult for people to publicly scrutinize them.
I can’t quite imagine what protections might make sense to keep trans people safe, and it’s hard for me to think about which group should be prioritized. Of course, ideally, we’d live in a world where anyone retaliating to someone’s gender transition would be headed for a hard time themselves.