FlyerTalk Forums - Please improve handling of broken embedded images

I just wasted a lot of time trying to find a post from a few months ago. It turns out I originally found it pretty easily, I just didn't realize I'd found the correct post. The most important part of the post was an embedded image of a screenshot of some text posted on Facebook. I remembered the text, but not the fact that it had been posted as an image. Of course the original image no longer exists. Unfortunately:

the image was hosted by a service that returns html when the image no longer exists;
the way vBulletin formats the post with a faulty embedded image, there is no clue that the post is missing something;
vBulletin uses alt="" for embedded images.

It would be nice if at some point vBulletin would take note the returned content for an image file is actually text/html. At a minimum the alt tag needs to always have content (for example, "[Embedded Image]").