Official age-rating for servers and realms

Hello! Since some adult servers are being taken down because of them having adult themes such as shooters and such. I think that instead of them being taken down, they could have an automatic "+18" age rating which would prohibit minors from entering the server while allowing accounts that are confirmed to be 18 and up be able to join the server. That way, it could provide more security to minors while also giving adults their own spaces and the server owners that have the "+18" could still do profit without having a minor at risk.