If they are so concerned about parties, then they should give hosts the right to ask for ID from all guests and to charge a hefty security deposit. And not just the multi-property hosts but ALL hosts.
Instead, they've taken these away from us and have left us to trust their AI, their algorithms and their judgment. Of course, we've all seen how effective AirBNB is in all of the above regards.
We have the category catastrophe and the drop in bookings because of Chesky's pet project to promote his cronies; high end/managed properties while leaving the traditional AirBNB's to twist in the wind.
We've seen their algorithms fail miserably on so many levels. Where do we begin? How about Exhibit A: Blocking bookings without giving hosts any say.
And we all know about AirBNB's judgment. One time dealing with their so called Customer Service agents in a 3rd world country who don't even know AirBNB's own policy will tell you about their bad judgment.
If they really want to put the damper on parties, they should set up a way that if a host discovers a party, they can log onto the guest's reservation and hit "Cancel" which automatically triggers the cancellation, an automated notification to the guest they have 2 hours to depart with no refund.