Guests under age 25 no longer allowed to book entire homes?

[KKC]

This is not new. Here’s an old thread about it:

Guest has been blocked from booking on AirBnB as they said she might be having a party

Has anyone come across a guest being blocked from booking for this reason? She wanted to book a three bed property for 5 people. Is this some weird new policy or does this indicate the guest is a horror?