Hi there. A lot of you seem to be pretty confused about things.
This is the year 2008. We are not a group of primitive cavemen unable to express our individuality.
Avatars and Signatures are a way of expressing ourselves, or identifying ourselves. Whether this is done in text or in a graphical representation, it's still the same concept.
Most of us have some pretty decent computers capable of viewing such graphical representations of someone's expressions(these expressions are sometimes called "art", but the representations themselves are called "images"). We don't surf the internet using DOS.
I forgot where I was going with that train of thought, but I have a better train:
I play Dwarf Fortress, as most of us do. From that we can assume two things about myself(And, by inference Yourselves as well):
1) Obviously, I don't mind looking at just text. But! That doesn't count when I'm reading forums. I find it muuuch easier to identify who's posting what when there are images in avatars and signatures.
2) I've got a large capacity for creativity and imagination. Somehow these things need to be expressed in everything I do.
3) I understand the value that some small object can represent. For example, the at sign on screen means a whooole lot more to me than just "@". He's an adventurer named Urist Forkedtongues, and he's got some swimming skills and exploded a dragon's head by throwing some sand at it. A loooot of information is represented by that little At Sign, much the way that some certain images can contain a lot of information that would be rather lengthy to explain, if explanation is required.
<-- Try to describe that emotion in 3 textual characters.
4) I enjoy my freedoms and choices. Dwarf Fortress is a really open game. You can do an incredible amount of stuff, and you're hardly bounded by rules or the like. I shouldn't have to be without a signature and avatar simply because someone's restricted by bandwidth issues, or because they're annoying to them.
As far as solutions go, incessant adding options to the forum code is probably something Toady doesn't want to do, and, if he's unfamiliar with PHP code(even if it is), it can be a looot more troublesome to do than many people realize. Easier said than done, I suppose.
There is a solution that you can do yourselves, in fact, and rather easily.
Every mainstream browser has a way to edit your personal CSS sheets for every webpage you're on. Well! This is handy, because I'm a web developer and can talk you through the steps to disabling images in signatures on your own. I'll even post a thread about it, if images are allowed at the end of this all.