Ninja’d.
Also, please don’t intentionally post horrifying images, or at least those that would get us in trouble with our e-mail provider (Sparkpost.)
Actually, blurring images by default would be a pretty solid plugin. It would be opt-in, of course, but the actual implementation would be very straightforward since most of the work has already been done with the spoiler tag plugin. It would just need to add a checkbox to the user preferences, and then logic that acts on that for every image.