Age-Restricted Server

Since some servers are fully NAFW, I request adding a feature in server settings>overview
to age-restrict server, so accounts under the age of 18 won't be able to join or dm users within the guild.

It will be a lot easier than age-restrict all the channels. speaking of that why don't you add age-restrict category? wouldn't it be a lot easier to sync channels and age restrict one category rather than 50 channels?