We arrived for a conference to an AirBnB and discovered when arriving at 10pm that it was likely illegal. ie got warnings about making noise and multiple people coming in simultaneously with suitcases, etc.

But your choices are either:

1 - pick a fight at 10pm, probably fuck around with AirBnB's shit customer support, maybe if lucky get to sleep at an alternate place by 1 or 2 am, then feel like utter garbage for the next 3 days;

2 - deal (with the implied: no more airbnb on business trips...)