TechCrunch is having a crisis of conscience over what they'll do with internal Twitter documents they've received.
My rule of thumb is pretty simple. The documents are stolen. Unless the documents reveal wrongdoing greater than stealing, such that the public interest served in publishing is greater than the private harm, then it's unethical to publish. Idle musings about "they are going to be published somewhere on the Internet" is specious; the morality of one's actions don't depend on whether someone else is "doing it", much less everyone.
If TechCrunch goes ahead and publishes these documents, it'll only further cement my already pretty low opinion of Arrington. (I'm not a habitual reader of TechCrunch, or otherwise I'd waste away over all the food I'd be vomiting up.)