https://www.reddit.com/r/VRchat/comments/1qdx6f4/so_with_the_mess_of_personas_age_verification/
Well... Persona, which Roblox uses, got sued precisely because on how they handle data
Roblox isn't the only one. Just look at UK and Australia. MINECRAFT AND DISCORD are also restricting chat in the UK via age verification, and Discord is social app first so there it's the equivalent of 'verify age to create account'