Seems like we've had an unusual profusion of very young users coming to the site lately. Not a bad thing at all, but a lot of them seem like they are below SE's age signup requirement.

Yeah... we're not sure why this is happening, or what, if anything, we can really do about it. I've updated the guidance for the [young-author] tag just to highlight the age requirement, and we're continuing to deal with any underage users as and when they're confirmed to be underage.

Updating the tag is a good idea, hopefully that helps.

I reported an underage user in Puzzling chatroom a few days ago, so it's not just our site it seems.