No. Some terrible human being who should be in jail is at fault here.
Airbnb and YC are all run by great people. Responding to a crisis like this is never easy. Responding to your first crisis like this is hardest of all.
I wouldn't blame Michael Arrington at all, either. I think he's done a great job at reporting this. But it's not his first rodeo, for some of the other people involved it is, and so I'm not surprised they've made some mistakes.
Also, in regard to the so called "coverup", it's totally natural when someone says bad things about you on the internet to ask them to take them down. That's not a "cover up". That's "being human". Imagine if someone posted a diatribe against one of your children. As a parent, wouldn't you want to get that taken down? Airbnb is these guys' baby.
I grew up in a political family and all the time my father and my family would get slammed in the paper and online. I used to have a knee jerk reaction and email people asking them to take things down. It hurts when people say shit about you, especially if you haven't developed really think skin. EJ is a great writer, so it makes the post that much more stinging. It shouldn't be taken down, but we shouldn't imagine Airbnb's asking for it to be taken down some nefarious "coverup". It's only human.