With as many pictures as I have, it might bring the internet down... ;)
Actually, the 'payload' could include a variation of Norton Utilities [tm] Undelete function and a search for deleted JPEGS prior to the E-Mail out function.
Whether or not there is pornography, just the use of all that bandwidth for images would take the Internet down.
Since I am not in the Virus writing club, if I could think of it, I'll bet someone is working on it if not already done.
Symantec maintains a vast encyclopedia of viruses. Very, very few make it "into the WILD."
Figuring out a method of distribution that is 'overwhelming' seems to be the thing that stops most viruses.