A nice idea @Graeme19 , to delete the reviews, along with the information. However, I imagine the algorithm / computer bot, wouldn’t be able to recalculate retrospectively.
HOWEVER: If the initial security requirements are tightened and adhered to, then any negative individuals (both hosts and guests) would eventually be blocked from the platform, forever.
Why? Because, their govt ID and their profile picture, which has to match the facial recognition of the Govt ID, would be red flagged, even if a different mobile or email was used. The red flag could then activate/create a second line of security scrutiny from Airbnb.
YaY! A perfect line of engagement!
As for guests with no reviews, but having Airbnb knowledge: they could have travelled with a partner, or part of a group, prior to opening their own profile, within the community.