I'm biased here. I'm still against .world and their tendency to use "legality" as a smokescreen. (Blaming it for banning Luigi content right after he axed that United guy has earned my ire forever.)
However... I'm almost 40, and it was always the rule to never mention your age until it didn't matter. So on the one hand, world loves to use legality to push it's agenda. On the other hand, this is an expected outcome.
This is a weird nit to pick. If you're doing it right, you're only mentioning your age when it doesn't matter (in safe places or places where your age is helpful, versus places like Lemmy where someone will ban you.)
A good example would be me saying, in this thread, I'm almost 40. Anybody who can use that against me doesn't matter to me.