I think Microsoft/Explorer automatically decide on some sites too, why they have stuff in there. I don't think adding stuff is easy unless it has scripting. A picture doesn't have any scripting or anything that can hurt you/your machine (usually, can but then your protection would catch that) so maybe how we understand the concept is flawed (not possible )

In the future, you can disable animated gifs so they don't blink or move; that I know works:

http://googlesystem.blogspot.com/200...ated-gifs.html