It's interesting to see that Airbnb is where the HN mindset goes; it reflects a certain degree of privilege that an entrepreneurial opportunity is the first use case surfaced.

Cramming extra family/friends into an apartment who aren't officially on the lease (e.g. the adult son who's lost a job or is on parole, or the parents who can't afford assisted living and are helping raise the grandkids) is actually far more common among low-income, rent-stabilized, and minority tenants. Stopping short-term Airbnb leases isn't particularly controversial; it's going after the medium/long-term unauthorized tenants that really has a disproportionate impact on the underprivileged.