>I don’t like the analogy because “hosting an event” is a fuzzy thing. If you are hosting an event with friends you might be able to rely on the shared values of your friends and the informal nature of the thing to enforce this sort of norm.

You can't, though -- not perfectly, anyway. Whatever the informal norms, there are going to be people who violate them, and so the fault shouldn't pass on to you when you don't know someone is doing that. If anything, the analogy understates how unreasonable it is to FB, since they had an explicit contractual agreement for the other party not to send them sensitive data.

And as it stands now, websites aren't expected to pre-filter for some heuristic on "non-consensual user-uploaded photographs" (which would require an authentication chain), just to take them down when informed they're illegal ... which FB did (the analog of) here.

>If you are a business that host events and your business model involves photos of the event, you should have a professional approach to knowing if people consented to have their photos shared, depending on the nature of the venue.

I'm not sure that's the standard you want to base this argument on, because in most cases, the "professional approach" amounts to "if you come here at all, you're consenting to be photographed for publication, take it or leave it lol". FB had a stronger standard than this.

> I'm not sure that's the standard you want to base this argument on, because in most cases, the "professional approach" amounts to "if you come here at all, you're consenting to be photographed for publication, take it or leave it lol". FB had a stronger standard than this.

It depends on the event and the nature of the venue. But yes, it is a bad analogy. For one thing Facebook is not an event with clearly delineated borders. It should naturally be given much higher scrutiny than anything like that.