> The problem here was that they didn't announce to the host that they are doing a test of their in-development equipment.
I might be okay forgiving skirting the disclosure rules BUT only if they tried to be model tenants and, if there was any damage, took steps to proactively make things right. If you're breaking the rules, even if there was no damage, you should definitely be cleaning up and putting things back in place.
But that like costs money and/or time.
This was my thought. I can understand not wanting to go to the hassle of trying to explain that you're testing an experimental prototype robot to a confused Airbnb owner.
What I find inexcusable is not owning up to the damage and paying to fix it when your prototype goes on a rampage of destruction.
Moving fast and breaking things is fine, as long as you fix the stuff you break...