Wow. I don't know where to begin on this one. I only work an 8 hour day here.
Seriously, no one likes to be the "Enforcer". Enforcing rules is a thankless and tiring responsibility.
Here's my personal observation. I haven't been keeping up with the forums lately (still have been on the site), but checking out some of the forums, I have to say some of the signatures are out of hand. [:0]
Personally, I would like to see tighter rules/restrictions/guidelines (whatever you want to call it) placed on signatures. It has gotten a bit out of hand in some instances. While that's my personal view, I'm not about to be the one responsible for making a policy that will most likely make some unhappy and even leave. I've been involved in many forums, not just for what I do here, but in my own private time. I know how important individual expression and signatures are for people.
The problem is that many people don't understand how to crop and resize images, nor do they understand file sizes and how it impacts other people. So while rules are great, I think educating people would be a better solution. Granted, we don't have the time nor resources to do a one on one with each new member. Hopefully in the next version of the forums, we'll have some tools built-in that will make it easier for members to include smaller images in their signatures.
In the meantime, if you see someone with a super-sized image and you're pretty handy with images, consider offering to crop the image for that person. With all the digital cameras out there, it's easy to take the picture and upload the image to the web. Very few people realize these pictures should be cropped/resized before posting.