I'm sorry, but I find these type of comments useless. So you're saying there's nothing AirBnB could do and there's no need for them to worry about it, so we can just end the conversation right now?

I think the point that was made was that there is an inherent asymmetry in that the guest can remain more anonymous than the host. Since the guest is more anonymous, there are less incentives to don't do stupid stuff as you can more likely avoid repercussions.

I interpreted the suggestion as thinking of ways to hold the guest more accountable. Maybe by having a verified bank account? Maybe a credit card held for long enough that it's reasonably not stolen (though could still be a stolen identity).

And yes, of course any system can be circumvented by a sufficiently motivated individual. But, like with locking your front door, it's about making it complicated enough that it's not worth it given the reward.

* Nor should you expect them to put systems in place that violate the rights of the majority*

This makes no sense. How exactly would AirBnB violate anyone's rights? It's a voluntary service you can use if you so desire.