The damage may be real, but "the problem of damage" is not. If my (theoretical) AirBnB guests damaged something I'm on the hook as if I damaged it myself. I don't get a free pass, so there's no externality. My strata organization can fine me for noise, wether caused by a party or an unruly tenant.

Even the way you present it is as if users of AirBnB are ripping everyone off ("consequences of his actions..."). It's just taken for granted.

And anyways, scapegoating is about the picking of a specific person to suffer for the crimes of the many. Singling out one person for something many people are doing is pretty unkind even if the thing is bad, which is debatable in this case.