There are two kinds of horror stories about Airbnb. When the home-sharing platform first appeared, the initial cautionary tales tended to emphasize extreme guest (and occasionally host) misbehavior. But as the now decade-old service matured and the number of rental properties proliferated dramatically, a second genre emerged, one that focused on what the service was doing to the larger community: Airbnb was raising rents and taking housing off the rental market. It was supercharging gentrification while discriminating against guestsand hosts of color. And as commercial operators took over, it was transforming from a way to help homeowners occasionally rent out an extra room into a purveyor of creepy, makeshift hotels.