Arrington's editorializing has been fairly tame in this story. A lot of the mess has been due to EJ's posts and Airbnb's attempts at damage control.
If you look through the original post, there are only a couple of lines where Arrington says Airbnb isn't financially responsible and that is, imho, a fair interpretation of what the spokesperson/Lukezic told him. TC has also done a fair job of publishing Airbnb's side of the story - guest posts, updating their posts, etc.
Airbnb's real problem here is EJ, not Arrington. Airbnb's image isn't getting tarnished by posts on TC, it is getting tarnished by EJ's blog posts which make Airbnb's people seem cold and insensitive.
If you look at PG's comments on the earlier thread, he seemed to imply that Airbnb disagreed with EJ's version of events (they called her before her second post, etc). That could be Airbnb's big problem - it seems to me they want to say EJ is lying but can't in public.