@Terrill0 OK, well the background checks are not universal - Airbnb will never disclose which accounts have been checked and which haven't. And while you can require verified ID (a farce in itself) for Instant Bookings, non-verified members are still free to send requests.
If you ultimately decided to accept these guests, I don't think you need to stay up all night policing them. The ID check is a step for your own protection, which you can do for all guests, but I think it's best to put aside the negative stereotypes about young people and treat them the same as all the other guests who have happily stayed with you once they've checked in.