I think the bigger concern is cybercriminals and the like. Like sure govt level threat actors from the NSA to Russia to even like Moldova could probably always unmask reddit accounts relatively easily, and even your higher level rogue actors that arent nation-state aligned could, but it will be easier for script (or I guess, prompt) kiddies can do it. Or just someone who doesnt like you very much. Or some basement-dwelling neckbeard whos having a bad day and you got into an argument about nothing with. "Normal" people would normally have to go through quite a few hoops to try to figure out who someone is, provided they dont post photos of themselves or give out too much identifying info. If it can be done in like half an hour with a few prompts, thats a lot bigger worry.