Where is your source for this? Buzzfeed guy was not an invited guest. His excuse was that, since he was not invited, he was not bound to the terms of the invita

Where is your source for this? Buzzfeed guy was not an invited guest. His excuse was that, since he was not invited, he was not bound to the terms of the invitation. As someone else has written, if you think you need a (written) contract to enforce ethics, you don't understand the concept of 'ethics'. Contracts are useful because they create legal -- not simply ethical -- obligations. In any event, if you don't appreaciate any of this, we can agree to disagree.