'No Parties Allowed' + allowing say 10-15 people + absentee landlord + renting to young people = Party Time, just about every time. Usually, young people do not get together in such numbers to hold a Bible recital, nor for intellectual pursuit to discuss Newton's Theory of Gravity, but to 'party'. And there lies the first problem with this issue - what constitude a 'party'? Noise level? Impact on the neighborhood? Level of stupidity?
I have read 50 perfect examples over the last 2.5 years I been in this forum where the hosting reality defies logic; where a large group of young people, especially unsupervised and in a 'sensitive' neighboirhood turms into > Royal Fiasco. A host is asking for trouble with one's neighbor and asking one's place to get thrashed, 90%+ of the time with those demographics.
Oftentimes what follows is the real killer - a claim for damages via (drumroll please) Airbnb's foolish 'Host Guarantee' policy, which indirectly all hosts ultimately pay for. The more Airbnb pays such claims the higher those fees will become. A matter of economics 101.
It all boils down to a matter of 'risk' - those making 'high risk' decisions should not be protected at the same 'rate' as those that do not; for a good example see the individual policies of every insurance company, which in many ways Airbnb's 'Host Guarantee' policy is pretending to be. The day Airbnb drops that insane policy, the less problems they will have and the more responsible hosts will become because it is now all up to them to choose wisely.
P.S. Bird Island was just featured in a few well-knowned 'popular' publications and one of the big websites, the most common question - how many people can the island 'fit'? Oh boy. My stock answer: "Bummer, all booked"
/off podium