They don't necessarily know that. Imagine you've used this FB feature in the past. You get a mail from @facebookrnail.com that tells you you can just email th

They don't necessarily know that. Imagine you've used this FB feature in the past. You get a mail from @facebookrnail.com that tells you you can just email them the photos without even opening the app now! Well isn't that convenient. Now, it's fair to say that even in a technically safer implementation where the photos never leave the device, many users can't tell the difference, so this point doesn't hold a lot of water. Still, I think making the uploading of scandalous photos to FB is a dangerous precedent to set in general. Will other services and startups that have users suffer from the same problem implement this feature in the same way, and guarantee user safety and privacy? That's a pretty high bar.