I'm not the only one to find the huge signature images annoying but rather than complain I did something about it. I used Firefox's filtering ability to remove all signature images.
Imagine my surprise when I turned off the filter and found my image replaced with this:

After looking around for a half hour or so I still can't find the "bloody FAQ" that might tell me what is so offensive about the image I have used for years. No one ever emailed me or PM'd me to tell me there was a rule change. Since I can not guess what rule I may have violated I have had to remove all images and text from my profile.
If you are going to change the rules tell people you are going to change the rules. An email or PM should be sufficient.
If you are going to have rules you should post them where people can find them.
The replacement image, which I suppose is an attempt at humor, is immature and insulting. You could just as easily have removed non-complying images or replaced them with text ("This image violates Rule x.xx and has been removed." ). In addition, it offers no link to the FAQ or other assistance in remedying the non-compliance.
I am not an idiot and I do not appreciate being treated like one.